In the closing credits sequence, Noel assumes a broadcast stance, extending the script pages on the far side of the mic. This is the way radio performers actually stood so that any rustling of script pages would not be picked up by the microphone.
Roz: Where are you going to find an idiot willing to take six dialect parts unrehearsed?
Daphne: Sound of ominous organ music, indicating trouble ahead.
Gil: Oh, Frasier! I've had a quick peek at your script, and I think I'd be perfect as Bull Cregan, the brutish gamekeeper!
Frasier: You know, Gil, I think that's just a bit too on the nose...
Gil: Well may-
Frasier: (interrupting) But you know what, you could play... Nigel Fairservice, drummed out of the Royal Air Force under... mysterious circumstances, hm?
Roz: With him playing it, they may not seem so mysterious.
Frasier: (in a spooky voice) 'Nightmare Inn'.
Martin: Oh, don't tell me, I know. A bunch of people get caught in a storm and everyone's wondering who's gonna be the first one murdered.
Frasier: Exactly. And I'm going to direct.
Niles: So we can stop wondering.
Frasier: Does she have any experience?
Bulldog: Are you kidding? If she had a dollar for every minute she spent on the stage ... Oh, wait a minute, she does.
Roz: I can't believe that any of my guests could be a mobboba mobbobo.
Frasier: (reluctantly sticking to the script) That's easy for you to say.
(Niles has had enough of Frasier's direction)
Niles: (angry) That's it! I'm just going to take this gun off the table. (takes balloons and bursts one) Sorry about that, O'Toole, I guess we'll never hear your fascinating piece of the puzzle. (two shots) Or yours, Kragen and Pépo! Could the McAllister sisters stand back to back, I'm short on bullets! (shot) Thank you! What was your name again, dear?
Roz: Miphif Thorndike.
Niles: Thank you. (shot) Ah, and also Mr. Wing. (shot, with bell fading) And of course, one final bullet for myself so the mystery will die with me. (shot) Ah...
(The cast walks away from Frasier, backs turned to him)
Frasier: (unsteady) Well then, that pretty much wrapped things up! Hans was a mass murderer, who to the surprise of everyone, the case was closed. And with a grateful shudder, I swore I never would return to Nightmare Inn.
(Maxine is dyslexic)
Maxine: Look out, he's got a nug!
Frasier: Mel, your German accent sounds a tad Austrian.
Mel: I've performed that accent on Broadway and the London stage.
Frasier: Yes, but perhaps they have different standards than I do.
Frasier: Let's dig in and find the reality. From the dwarf's entrance...
About 12 minutes into the episode, the radio play begins and at Frasier's apartment, Daphne, Martin, and Eddie are listening. Eddie is plainly seen tilting his head to one side, listening intensely to the sound of Frasier's voice on the radio.
This is an allusion to the painting "Dog Looking and Listening to a phonograph" Francis Barraud of the dog Nipper with his head tilted and looking intensely at the horn of a gramophone. The picture, nickenamed "His Master's Voice" eventually became the well-known icon for RCA Records.
Frasier: (when signing off his show) This is Dr. Frasier Crane reminding you that, (In a throaty, sinister voice) you'll never know what's lurking in the shadows... (maniacal chuckle)
This is a direct quote from the golden age radio thriller, The Shadow as spoken by its star, Orson Welles.
The voice actor, character named Mel White, is a homage to the late great voice actor Mel Blanc.