The re-run prints that first aired on CBS in 1971 feature standardized opening title music for all first season episodes. A number of the first season episodes feature alternate opening (and/or closing) theme music (see trivia). Excepting prints aired on cable between 1990 and 1998 (which were time-compressed copies of the original broadcast prints, all but the first two missing their laugh tracks), all re-runs of this show use the 1971 prints.
