The running joke in the show is how much Det. Sgt. Webber reminds everyone of the main character in "Dragnet," Joe Friday. It's no coincidence that the "Webber" is very close to that of Jack Webb, the actor who played Sgt. Friday.
Howard's line "The Colonel's got breasts!" referenced a then current KFC ad campaign highlighting newly available chicken parts.
According to the sign displayed while Emily is filling out her deposit slip, the bank robbery occurred on April 5, 1977.