When Sam (Scott Bakula) briefly changes history, numerous changes result: Al (Dean Stockwell) is replaced as his observor by Edward St. John V (Roddy McDowall) who calls him "Samuel"; Ziggy is now Alpha; Gooshie and Tina are married.
Roddy McDowall (Edward St. John V) was a close friend of Dean Stockwell (Al) for many years.
Roddy McDowall (Edward St. John V) receives the "and" credit.
Jamie Walters's voice is dubbed over by Dean Stockwell.
Al (Dean Stockwell) did not start smoking cigars until he began serving in Vietnam.
Sam (Scott Bakula) had a great-aunt named Tilly. She was the last person before Edward St. John V (Roddy McDowall) to refer to him as "Samuel."
(Al is attempting to explain the concept of leaping to his younger self)
Bingo: (referring to Sam) So I’m him and he’s me?
Bingo: Then who are you?
Sam: But you’re married!
Lisa: Yes and so is my husband but it hasn’t stopped him from landing in every blonde from here to Norway!
Sam: He’s gone!
Al: Who’s gone?
Sam: My shadow, he’s gone!
Al: Maybe he went to the head.
Sam: He would sooner wet his pants than leave his post.
Sam: (immediately after leaping in) This guy’s got more women than you do.
Al: That’s funny. That is funny. That’s hysterical. Have you looked in the mirror…you haven’t looked in the mirror yet have you?!
Sam: Commander, if I could have a few minutes to myself before we reconvene?
Commander Riker: You won’t be alone.
Sam: Yeah, well, I’ve come to think of him as my shadow.
"Shadow": Sir, Sir.
Sam: Hmm, come on, Shadow.