Executive producer Al Burton is standing on the sidelines of the stage during the variety show - you can see part of the "Charles in Charge" crew jacket he is wearing!
They could've at least brought back Sandra Kerns(Ellen)for the final episode, throughout the 4th season they only showed her once, and in the 5th season they showed her twice.
Jamie: Hey, I'm really impressed, Charles is a really good ventriloquist?
Sarah: Jamie, that's Buddy up there, did you really think he was a dummy?
Jamie: Do you really think he isn't?
Lillian: Oh, wow, this is really exciting, it's like an old Judy Garland-Mickey Rooney movie.
Buddy: Yeah, maybe we can rent a barn and put on a cow?
Walter: Better yet Lembeck, why don't you rent a padded cell, and put on a straight jacket.
Jamie: You know I think maybe you could be Adam's lovely assistant tonight, I'll just work in the ticket booth.
Jamie: To give people their money back when they walk out.
Sarah: It's not the end of the world Adam?
Buddy: The show will go on Adam, I'm gonna direct this show?
Sarah: I lied? It is the end of the world.
Adam: Well, that's too bad Sarah, see I was going to let you be my lovely assistant and wear a beautiful costume.
Jamie: You want Sarah to be your lovely assistant? Well, what am I the elephant man?
Adam: I don't know why don't you take off your mask and we'll find out.
Buddy: They're throwing a fund raising variety show and your invited?
Charles: But, I don't wanna go to a fund raising variety show, I wanna go to Princeton.
Lillian: Charles, your losing your buttons?
Charles: Why wouldn't I Mom, why wouldn't I, the mailman is late again and this clock is covering for him.
Charles: You're a clock your supposed to tell me what time it is, I'm not supposed to tell you.
As the ending credits were rolling the studio audience was singing the theme song to the show.
Sandra Kerns(Ellen)did not appear in this episode.
This is the final episode.