Wittgenstein

Wittgenstein 'is a TLW-728 Super Computer Prototype who appears in The Brave Little Toaster Goes to Mars and The Brave Little Toaster to the Rescue''. He is powered by a very rare cathod tube called a WFC 11-12-55. He was outmoded when transistors were invented. Later he got a terrible virus that infected his tubes causing him to not properly function, anymore. He stars in the song "Chomp and Munch" and is voiced by Brian Doyle-Murray.'''

The Brave Little Toaster Goes To Mars
The appliances learn that Robbie has been transported to the planet Mars, and the gang goes to Mars to rescue the Little Master. The gang contacts their old college buddy Wittgenstein through the computer and he gives them the equipment that they need they need to get: a ceiling fan to fly, a laundry basket to travel in, a microwave and a bag of microwave popcorn (with cheddar cheese flavoring) to help them fly. After getting all the stuff they need the appliances head off to Mars and on the way they're encountered by singing balloons (We're Floating).

The Brave Little Toaster to the Rescue
The appliances first find Wittgenstein in the basement and discover him abandoned, all alone, run-down and broken. The miserable supercomputer reveals that he is living on one rare tube, named the "WFC 11-12-55." The appliances learn that unless they find a replacement quickly, Wittgenstein's old tube will blow out and lead to his apparent death. In an attempt to revive Wittgenstein to his superior state, Radio and Ratso go to the college's storage building to find the hard-to-find WFC 11-12-55 tube. When they come back with the last apparent tube for miles, Radio accidentally breaks the tube, and it seems that all hope is lost because Mack, Rob's lab assistant, plots to sell the injured animals that Rob had been tending to a place called "Tartaras Laboratories." Wittgenstein does his best to warn the Master with all his might, but he blows his tube with a big explosion and apparently dies.

The appliances then get mad at Radio, and he feels terrible. He then sacrifices his own tube which turns out to be the very rare tube they had been looking for, thus leaving himself as a lifeless appliance. Apparently, the appliances replaced the tube in the nick of time; with the boosted power of the new tube, Wittgenstein wakes up, miraculously regenerates the other smashed tubes connected to himself and is completely revived to as good as new. He then warns the Master and sends the appliances to go rescue the animals.