Get Christie Love! (1974): Well I'll be! That was Ron Rifkin of recent Alias fame! (I also think of the "back room chock-full of shoes" Sex and the City episode he was in when I see him; not sure why.)
There were some classic lines in this one (e.g., "You're a detective! So start detecting!" and "What'd ya think? I just called room service and said, 'Send up one killer, please'?"), but, now that I've read about Teresa Graves, all I can think to write about is her life: she quit acting back in the 70's, became a Jehovah's Witness, and died just a copy of years ago in a house fire. For some reason, that just strikes me as weird.