Todays evil robot is...

HAL 9000

HAL 9000 needs no introduction really but for those of you who aren't familiar with this little wonder he was the super computer aboard the Discovery One in Stanley Kubrik's masterwork 2001: A Space Odyssey. HAL was embued with human personality traits and a very soothing voice and for the most part was a kind of benign colleague of massive intelligence and friend to the other crewmembers Frank Poole & Dave Bowman. Unfortunately HAL wigs-out and starts bumping people off. What makes HAL's murderous streak so fascinating however is the fact that he's so lifeless in appearance (he's just a big red lens) yet his voice is so calm and soothing. HAL is so practical and methodical in his nastiness it's very disquieting. When he uses an empty EVA Pod to cut the oxygen tube on Frank Poole's spacesuit it's done in total silence and the image of Poole scrabbling around in desperation, trying to fix it before floating lifelessly off into space, has stayed with me ever since I first saw it.
Anyhow, Poole gone HAL now switches off the hibernation pods of the scientists on board and locks Dave Bowman out of the ship when he goes to retrieve Poole's body. Bowman forgot his helmet you see and therefore can't use the emergency airlock to get back in. Silly spaceman. He does get back in however by firing himself like a bullet into the airlock and bouncing around for a bit. After that he goes inside HAL to switch him off. Inside HAL is truly beautiful and one of the most memorable sets I've ever seen. He's all shiny and winkie-lighty inside and ickle Dave Bowman turns back and forth all floaty inside him buggering about with switches in a way that would definitely invalidate the warranty if it were my laptop for example. Apple 'aint gonna be taking HIM back now Dave that's for sure.
It's actually very moving as HAL 'dies' and reverts to his early programming singing Daisy Bell more and more slowly until. Pop. No more HAL. Bye HAL.

But wait a spacesuit popping, scientist killing, children's song singing minute, what's that coming over the horizon? Why it's that bloke from Jaws and Helen Mirren in 2010: Odyssey Two. There here to find out what happened to Dave Bowman & co. so they reboot HAL and it turns out HAL wasn't a naughty, naughty lens just a very confused one. You see his primary programming meant he had to divulge all important knowledge 'bout his mission to the crew but he'd been ordered to keep it quiet. This sent him into a bit of a lather and he'd reasoned (quite logically) that if there were no one to keep the secret from then everything would be alright. So he killed 'em. See, logical.

"I'm sorry Dave, I'm afraid I can't do that."