Oddly, the well-known character actor Robert Cornthwaite is uncredited in the brief but important role of the mysterious Mr. Osterwald.
Inspector: It's just tea. Look. (Takes a sip) Needs more gin.
Inspector: This soup comes from the corner delicatessen, complete with a guarantee to cure the common cold. Ellery, soup. Spoon. Eat.
Ellery: Well, Gesundheit. Forget that restaurant, I'm taking you home.
Inspector: Now, now, it's nothing.
Ellery: We're gonna nip this thing in the bud. I've got the most fantastic cure-all. Hot lemonade and sassafras, mixed in with the extract of a pound of calves' liver.
Inspector: I can't stand liver.
Ellery: --And after a rubdown with menthol and oil of peppermint, you take a bath in scalding chicken soup--hold the noodles....
Ellery: Dad, I've had your home remedies before and I'd really rather have the cold.
Manning: Do I detect a note of envy?
McVey: A little. If they had counted sales I would have won that award quite easily.
Magda: Edgar, if there's anything worse than a sore loser it's a sore winner.
Manning: Magda, my love, God has been generous to you. Don't ruin it by trying to be clever.
Magda: Why do publishers put a price tag on art?
Manning: Since when have you been bothered by a price tag?
McVey: You're outta line, pal.
Manning: Must you talk the way you write?
Inspector Queen: What in the world are you doing, McVey?
McVey: I'm doing your job, Inspector. Somebody has to.
Tisdale (to Inspector Queen): I can't understand why you're taking the word of a vindictive woman.
Ellery: Nick, I wasn't trying to steal your girl.
McVey: I knew that when you brought her here.
McVey (to Ellery): Maybe you'd like to have your nose re-arranged.
Ellery: I'll be Edgar Manning. Velie, would you be the killer?
Velie: If you say so, Maestro.
In this episode we learn that Ellery dislikes lemonade.
Richard Jaeckel's best known role is that of Sgt. Clyde Bowren in the classic war drama The Dirty Dozen.
This was the final episode to be shown in the show's original Thursday night timeslot. Beginning on January 4, 1976, the show moved to Sunday nights.