"A Fistful of Simoleans"
(season premiere, part 2)

Episode transcript (provided by Kooshmeister)

Willy fixes the accelerator, and the crew escapes toad clutches. Bucky officially lets Willy join the crew, and Willy is given the history of how the toads became evil after being brainwashed by a computer program known as KOMPLEX. They then fly to Warren, only to discover that not only has it been conquered, but the entire climate has been converted into a swamp. The crew makes the discovery that the toads have perfected a climate converter that can alter the climate of an entire planet.

Bucky and the crew fly to a space station in orbit of Genus, where they meet Bruiser, Bruce's brother, who is made a member of the crew as a storm trooper. Bucky decides to find another warp drive mechanic, since Willy can only work part time, but is overheard by the spy Al Negator, a sleazasaur hired by the toads to get the codes to Genus's security system. Bucky and Jenny make their presentation to the council, which agrees to commission one more ship -- The Indefatigable, under the command of Commander Dogstar. Bucky returns to the ship to find Al Negator as the only applicant for the mechanic position, since the sleazasaur has taken care of all of the others. Despite everyone else's warnings, Bucky hires Al, and they set off. Willy returns to his home dimension, promising to return.

Al Negator wastes no time, quickly stealing the codes and making a run for it on the toad croaker. Bucky and the crew follow -- straight into a toad mothership. Unfortunately, Al has also sabotaged their controls, and they are helpless (Willy, whose bad luck never fails him, walks in at this time), trapped inside the mothership.

This episode is available on the US video "The Toad Menace" and the UK video "War of the Warts."