"Y'know, I've been keeping up with some environmental issues and I've learnt that in ten years time, the sea will have flooded half of Britain...which is good, because I've always wanted to live by the sea. And did you know that every year, manufacturers destroy a forest the size of Belgium. Why not just destroy Belgium? Thankfully, the one thing the world doesn't have less of is roboteers, even if they do let off some pretty obnoxious gasses."
— Craig Charles' introduction

Heat K of Robot Wars: The Fourth Wars was the eleventh of sixteen heats which determined the semi-finalists of Robot Wars: The Fourth Wars. The episode featuring Heat K was originally broadcast on December 15, 2000 on BBC Two. The broadcast managed to attract 2.71 million viewers, a decrease of 710,000 viewers when compared with the previous episode. According to BARB, this meant it ranked nineteenth in the top thirty highest rated BBC 2 broadcasts during 11-17 December.

Competing RobotsEdit


Little fly
Little Fly
Weight 79.8kg
Dimensions 0.50 x 1.20 x 0.90m
Clearance 0.05m
Power 2 x Wheelchair motors
Weapons Lawnmower blade
Notes Aluminium shell
From: Dover
Team Members: Andy Hosking, John Woodward & Richard Woodward
Weight 79.9kg
Dimensions 0.70 x 1.12 x 0.81m
Clearance 0.08m
Power 2 x 750 Watt motors
Weapons Jack powered armour piercer
Notes Gears from motorbike
From: Brighton
Team Members: Sam Smith, Simon Coulthard & John Coulthard


Evil Weevil 2 (seeded 12th)
Weight 80.2kg
Dimensions 0.30 x 1.10 x 0.70m
Clearance 0.02m
Power 2 x Electric motors
Weapons Spikes + sledgehammer
Notes Base is from a security van
From: Cardiff
Team Members: Kevin Pritchard, Mark Mellor & Ashley Evans
Weight 77.3kg
Dimensions 0.25 x 1.40 x 0.70m
Clearance 0.02m
Power 2 x 24 Volt motors
Weapons Pneumatic mouse trap
Notes Chassis used to be a desk
From: Oxford and Bristol
Team Members: Jason Launchbury & Stan Launchbury
Sump thingy
Sump Thing
Weight 79.6kg
Dimensions 0.51 x 1.04 x 0.95m
Clearance 0.08m
Power 2 x Electric motors
Weapons Pickaxe, spike & wedge
Notes 2 years to build
From: Leicester
Team Members: Richard Dig, Jon Lort & Geoff Germainey
Weld-Dor 2 (seeded 28th)
Weight 80.4kg
Dimensions 0.35 x 1.20 x 0.95m
Clearance 0.08m
Power 2 x Electric motors
Weapons Pneumatic hammer + ram
Notes Can flip & self right
From: Belfast
Team Members: Phelim Lundy, David Lundy & Damian Kilgallon


Evil Weevil 2 (12) vs Mousetrap vs TiberiusEdit

Dead Evil Weevil

Evil Weevil 2, immobilised due to a dead battery

Mousetrap brought its weapon into play straight away, but couldn't make any contact with Tiberius. Evil Weevil 2 then slid underneath Tiberius and forced it backwards. Mousetrap drove at the back of Evil Weevil 2 and slammed down the weapon again, and from the attack, it appeared to get stuck. Evil Weevil 2 sat motionless as Tiberius drove at the side of Mousetrap and plunged its piercer into the shell of Mousetrap.

"This is a surprise and a shock. The number 12 seeds from Llantarnam School - Evil Weevil immobilised."
— Jonathan Pearce

Evil Weevil 2 was still not moving, so Dead Metal and Shunt closed in. Meanwhile, Mousetrap was stuck on Refbot - who separated Mousetrap and Tiberius - before Refbot managed to shake him off.

"Mousetrap in the clutches of the Refbot. What is going on there? Referee's not supposed to do that!"
— Jonathan Pearce

Dead Metal and Sergeant Bash carried out their punishment on Evil Weevil 2, while Tiberius pinned Mousetrap in the CPZ. Sergeant Bash pushed Evil Weevil 2 onto the arena floor flipper, and some of the plating flew off the rear of the machine as it landed.

After the battle, it was discovered that the battery that was selected by the Evil Weevil 2 team was only partially charged, and therefore died part of the way through the battle.

Qualified: Mousetrap & Tiberius

Weld-Dor 2 (28) vs Sump Thing vs Little FlyEdit

Welddor sump thing

Sump Thing strikes Weld-Dor 2

Weld-Dor 2 pursued Little Fly, whose weapon caused minor damage to the side of Weld-Dor 2 before getting lodged in the side of it. Sump Thing slammed its pickaxe down onto Little Fly's blade, causing minor sparks. Weld-Dor 2 then got underneath the front of Little Fly, but couldn't force it back, before all three robots slammed into each other.

"Oh, slam! Likes dodgems in a fairground."
— Jonathan Pearce

Little Fly's blade was stuck in Weld-Dor 2 again, before it came unstuck. Little Fly suddenly came to a halt, so Sump Thing came in on a drive, before Little Fly started to move again. Sump Thing then focused its attacks on Weld-Dor 2, slamming the axe down continuously.

"All the aggression from Sump Thing, and Richard Dig - to give him his full name - is doing splendidly here."
— Jonathan Pearce

Weld-Dor 2 moved Little Fly close to a CPZ, and Little Fly stopped moving again for a short period. Weld-Dor 2 drove at Sump Thing, edging it towards the flame pit, before the two clashed again; Sump Thing managed to force Weld-Dor 2 around, and then axed it, appearing to catch the interior. Weld-Dor 2 suddenly stopped after this and was immobilised.

"That was the penetrating blow of the axe of Sump Thing. And I just wonder - Weld-Dor, I think has been immobilised by that blow!"
— Jonathan Pearce

The House Robots closed in, with Sergeant Bash and Shunt penetrating the shell of Weld-Dor 2, before Sir Killalot grabbed Weld-Dor 2 and dumped it in the pit.

After the battle, it was revealed that Little Fly had in fact severed a battery cable, rendering a dented Weld-Dor immobile, instead of Sump Thing who was previously thought responsible for Weld-Dor 2's demise.

Qualified: Sump Thing & Little Fly


Tiberius vs Little FlyEdit


Matilda, a little shove, a little glance, a little delicate blow...

Tiberius started aggressively, forcing Little Fly backwards. Little Fly managed to get a couple of glancing hits onto Tiberius with its blade, before Tiberius forced Little Fly against the arena wall and then into Sergeant Bash, who clawed it.

"Tiberius has set Little Fly up for destruction here."
— Jonathan Pearce as Sergeant Bash damages Little Fly

Little Fly backed away, but Tiberius quickly came onto the attack to shove Little Fly around again. Little Fly's blade continued to be impotent, and Tiberius then drove Little Fly across the arena and into the arena wall, with one of the arena spikes stabbing the back of Little Fly. Refbot split the two robots up; Little Fly moved away, but Tiberius was stuck in forward gear and was wedged in on the arena spike.

"There's something wrong there! I think the gears are stuck!"
— Jonathan Pearce

Shunt came in and axed Tiberius, before Sir Killalot lifted Tiberius up and took it towards the pit. The House Robot nearly drove in itself, before it dropped Tiberius, with the shape of Tiberius leaving it beached over the pit. Matilda flipped Tiberius onto its side and further into the pit before a final little nudge from Shunt saw them engulfed in smoke.

Winner: Little Fly

Mousetrap vs Sump ThingEdit

"Sump Thing, scrapyard chique, what's next? Gorgeous Grunge? Classic Crustic?"
Jonathan Pearce, prior to the start of the match

Mousetrap pins down Sump Thing's axe

Mousetrap drove at Sump Thing, with Sump Thing missing with an axe blow as it reversed away. Sump Thing then flew over the top of Mousetrap, with Mousetrap missing with a swing of its weapon. Sump Thing came in and axed Mousetrap, before Mousetrap impeded another swing from Sump Thing by trapping the pick axe with its own weapon.

"And it has pinned Sump Thing's weaponry down! A great slam of the mousetrap."
— Jonathan Pearce

Mousetrap bowled Sump Thing against the arena wall before Sump Thing came in with a strong drive of its own. Mousetrap tried to force Sump Thing in towards Dead Metal but nearly went in itself. Mousetrap slammed down with the trap weapon once more, before misfiring with its next attack, in which the weapon got stuck. Mousetrap suddenly stopped, so Sump Thing charged in again with its axe, repeatedly hitting Mousetrap. Mousetrap eventually began to move again, but only for a brief moment, as it came to a halt again, next to the arena wall.

"Is everything okay with the Mousetrap controls for Jason Launchbury?"
— Jonathan Pearce
Sump thing immobile

Sump Thing immobilises itself

Sump Thing slammed in once more, and Mousetrap starting limping back into the action. Sump Thing lunged at the struggling robot, but Mousetrap managed to move out of the way; Sump Thing ran into the arena wall, snapping the chain, and leaving the wheels with no traction, meaning it was beached on its own fork.

"Down went the forks on the front, and they buckled underneath, and that means there's no traction for the great wheels. Sump Thing... Dig, you have dug yourself into oblivion here!"
— Jonathan Pearce

The House Robots closed in; Sump Thing was plucked up by Sir Killalot before Dead Metal pitted Sump Thing. The judges decided Mousetrap was still mobile but only just, so it went through, ending Sump Thing's impressive run.

Winner: Mousetrap


Little Fly vs MousetrapEdit

Mousetrap vs Little Fly

Little Fly trying to take out the spring on Mousetrap.

Little Fly moved up the wedge of Mousetrap, with Mousetrap slamming its weapon down onto the blade of Little Fly. Mousetrap's weapon was jammed, and Little Fly came in, causing a shard to fly. Mousetrap's weapon finally fell back into place, but the robot itself came to a stop for a few seconds before it started to move again.

"Mousetrap, again, just waiting... Come into my parlor said the Mousetrap to the Fly."
— Jonathan Pearce

Little Fly attacked the side of Mousetrap, causing its blade to stop moving, before Mousetrap fired its weapon, which clipped Little Fly. Mousetrap parked itself over a flame jet as its weapon slammed onto Little Fly. Mousetrap then forced Little Fly back, against the arena wall and threw its weapon down again. Mousetrap held its weapon there, so Refbot split the two up. Little Fly drove at the front of Mousetrap, with the lawnmower blade stopping against part of the trap mechanism. Mousetrap then drove Little Fly back, wedging it on part of the pit. Little Fly got away, but Mousetrap drove at the back of Little Fly and pushed it into Matilda. The House Robot flicked Little Fly up, before it escaped.

"In the CPZ, Little Fly; needs to get away from there."
— Jonathan Pearce

With the clock ticking down, both robots began to limp slowly. Little Fly went in with one last half-hearted drive before 'Cease' was called. The judges' decision went in favour of Mousetrap.

Heat Winner: Mousetrap

"We've got our own rules, and we've got our own laws, but controversy rules on Robot Wars!"
— Craig Charles' sign-off



Banshee hits the target

During the Fourth Wars, alongside the main competition, a Pinball Warrior Tournament and Sumo Basho Competition were also held. Unlike the similar competitions of the Third Wars, these trials featured successful qualifiers for Series 4. In between the first and second rounds of each heat, a Pinball run took place, and two sumo attempts took place in between Round 2 and the Heat Final in each of the first eight heats. For Heat K, the Pinball featured Banshee.

Pinball Warrior Tournament - BansheeEdit

Score: 75 points

Trivia Edit

  • Heat K was the only ever heat to have both seeds fall in Round 1. Evil Weevil 2 became the highest ever seed to lose in a first round battle.
"The two seeds, are out!"
Jonathan Pearce, after reading the Round 2 line-up
  • Heat K was the only heat in Series 4 where none of the competitors competed in either the Trial Competitions or the Christmas specials.
  • Heat K was also the only time in four attempts that Sumpthing managed to pass Round 1.
  • Heat K was the only heat in Series 4 where none of the robots - including the side event competitors - ever competed in an Annihilator.
  • Heat K was the only heat where all six competitors would feature in a Fantasy Fight in the Robot Wars Magazine.
  • Heat K presented Mousetrap with an opportunity for revenge on Evil Weevil who defeated its predecessor Triterobot in the previous series, and succeeded.
  • Weld-Dor's status as a seed was not mentioned in its intro.

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