Trouble (not that that's unusual on this ship)

Who: Cerebrum
Where: One of the various hallways in Blue Dwarf
When: The timeframe during which he was walking in the hallway
Cerebrum was walking along, thinking up of a variety of different
ways to annoy Dr Keto, when he felt a familiar sensation. The
sensation was a faint voice in his head telling him to go on a brutal
killing spree. What this meant was that it was time to take another
pill.
He removed the bottle from his pocket, and shook a pill out of it
into his hand, or rather, tried to. He then discovered that the
bottle was empty.
"Oh no!" he shouted.
"What's wrong?" asked a passing crewmember.
"I've run out of pills," he said.
"Is that bad?"
Cerebrum slugged him across the jaw. The crewmember slammed into the
wall and slumped down, unconcious.
"Of course it's bad!" he yelled at the senseless body, "It means that
there's no control on the large amounts of insanities that are inside
my mind!"
His mind then switched to thinking about Dr Keto, and about how Dr
Keto, in his newt form, had caused great pain to his foot. His mind
jumped the tracks and switched to a new personality.
A short while later, in the medi-bay
Cerebrum walked in, apparently normal except for the Victorian era
top hat he was wearing and the very large, very sharp knife held in
his hand.
"Excuse me. But could you, by chance, tell me where I could find the
illustrious Doctor Keto?"
"He was here a while ago," responded Wilflower, "but he left to be
the site medic for the engineers outside."
"Splendid. Thank you for the bit of information. If he comes back
here, tell him that Jack the Ripper's looking for him, will you?"
then he turned and left, heading towards the outside. He had a bone
to pick, or rather, a knife to stab, with Dr Keto.