Sam leaps into the body of Sam Biederman, a mental hospital patient being treated for severe depression. Unfortunately, he's been administered shock treatment and it has fried his brain so that he now thinks he various characters he has previously leaped into. Al is there but Sam doesn't recognize him and the attending psychiatrist thinks he's suffering from multiple personality disorder. Sam is actually there to help a fellow patient, Tibby, who will end up living on the street unless Sam can change the future. Al tells him that the only way to get his own personality back however is to undergo another shock treatment.
—garykmcd