PANIC!

We love Marvin. 

• "I've calculated your chance of survival, but I don't think you'll like it."
• "Here I am, brain the size of a planet, and they ask me to take you down to the bridge."
• "The first ten million years were the worst. And the second ten million years: they were the worst too."
• "I am at a rough estimate thirty billion times more intelligent than you." 
• "It gives me a headache just trying to think down to your level." 
• "The Universe? A total waste of space. The whole thing."
• "I think you ought to know I'm feeling very depressed." 
• "Pardon me for breathing, which I never do anyway so I don't know why I bother to say it." 
• "Funny, how just when you think life can't possibly get any worse, it suddenly does."
• "I've been talking to the main computer. It hates me."
• "I'd roast slowly in hell before I gave you a piece of advice."
• "Do you want me to sit in a corner and rust, or just fall apart where I'm standing?" 
• "Don't pretend you want to talk to me, I know you hate me."

Marvin’s extreme gloom often saves the day in the most absurd ways.

• Marvin defeats a hostile, heavily armed police spacecraft by plugging himself into its cybernetic computer. He explains his view of the universe, causing the ship's computer to commit suicide from depression and shut down its own life-support systems.
•  Confronted by a giant, unstoppable military robot programmed to destroy him, Marvin tricks it into destroying the floor beneath itself. He convinces the tank that the ground is "not worthy" of being stood upon.
• Left behind on a planet, Marvin spends 576,000,000 years doing nothing but parking cars at Milliways, the Restaurant at the End of the Universe.

Due to time travel, Marvin is 37 times older than the universe itself. His body is completely worn out. His parts are rusty, his joints ache, and he is held together by wire and tape. Arthur Dent and Fenchurch help Marvin travel to the planet Prevalia to see God's Final Message to His Creation.  "We apologise for the inconvenience." Upon reading it, Marvin smiles, says, "I think... I feel good about it," and peacefully shuts down forever.