(KACL staff members are holding a clandestine meeting in Roz's studio to discuss their strategy for securing a raise)
Frasier: (as Noel Shempsky cautiously closes the door) Ah, yes. You've really dropped the cone of silence now. The "Cone of Silence" is one of many recurring joke devices from the 1960's comedy series, Get Smart starring Don Adams. Actually, the term originated on the 1950's syndicated TV show Science Fiction Theatre in an episode titled "Barrier of Silence".