Quote from Frasier in Deathtrap
Frasier: Oh. Oh, we almost forgot our memory box. You know, we never even looked inside. Frasier: Oh Niles, look. Niles: Oh. This is the program for our backyard production of "Hamlet". Frasier: I'd totally forgotten about that. Niles: So had I! [Niles opens the program. He and Frasier take a brief glimpse, before Niles slams it shut.] Frasier: You know, Niles, we may owe Mr. Lasskopf an apology.