An accident leaves Quinn comatose and Stormy allegedly smarter. Have they really switched brains?

Dr. Quinn forcibly takes a well-deserved vacation, inside Sealab's walls, the crew attempts to find out what he's doing.

A loophole in the Sealab charter turns everyone into captains, except Stormy (too stupid), Quinn (too proud to exploit the loophole), and the Chinese crew members (because of previous Asian accomplishments, including anime, among other things). How will Sealab survive? And where did Capt. Murphy go?

A network executive audits the set of the hard-hitting action drama Sealab 2021, with hopes of somehow salvaging the dwindling series.

Debbie and Quinn break up, while Dr. Virjay gets his old rock band back together.

Captain Murphy opens Sealab to tourists, eventually prompting Dr. Virjay to renounce his religion, and begin to eat meat from cows.

Kommissar Murphy brings Marxist-Leninist ideals to Sealab.

Hollywood Actor Beck Bristow (Brian Bloom) comes to Sealab to study for a television role.

Due to an incident with Chubby Carol, Quinn (who doesn't think Carol is so chubby) is blackmailed into giving each crew member a robot body, but what is to become of the crew's old bodies?

The Sealab crew attempts a daring rescue mission to Ice Station Zebra, one of whose inhabitants has turned to cannibalism. They are accompanied by a German who "came with the sub," bears more than a passing resemblance to Jürgen Prochnow and is given to firing his pistol inside the sub and shouting "Sieg Heil, Cornelius Drebbel!" Unfortunately, the two inhabitants of Ice Station Zebra cannot be rescued due to a lack of wetsuits, thanks to Debbie packing an attractive dress for herself instead.

As Captain Murphy leaves for The Great Spice Wars, a new captain, Tornado Shanks, is given the helm.