Captain Pettifer's mission so secret even he doesn't know what it is, yet scores of other people do. Collecting Robot 35 on the mission, he also restores Robots 7 and 20, before Murphy and two criminals try to steal the secret. Marko
Pirate Murphy hatches one of his most dastardly schemes: swapping the intelligence of SID with Robot 20. With Voyager now left with an idiot for a computer, Murphy escapes into the past using the ship's time machine.