Continuity: In the Guide entry on the Babel Fish, the teletype text that displays the words spoken by the guide stops after the word 'anything', but the voice of the book speaks a further line.

Revealing: When Arthur and Ford get flushed out of the Vogon ship, the airlock's exterior hatch changes from a sliding design (as seen inside the airlock) to a hinged design.

Continuity: The Vogon Captain has a much smaller nose than he did in Episode 1.

Other: At the point where someone gets a small bruise on the upper arm, the crew are all in a pile and thrashing about on the floor. There are 5 pairs of legs instead of 4. Arthur is in his pajamas, Zaphod is in orange trousers, Trillion is lying on top of Ford and Ford is too far away for them to be his legs.

Revealing: The mice on the table are in slow motion. What's more, you see the same shots of them several times.

Audio problem: When Deep Thought is describing how he's going to create a new computer, he describes it as "a computer that can calculate the answer to the ultimate question." This is wrong: Deep Thought himself just did that. The new computer is supposed to calculate the question, not the answer.

Visible crew/equipment: When Zaphod says his first line "I certainly didn't survive.", you can see the person who plays his third arm standing behind him.