The Late Show (1977)

Ira Wells is an aged retired Los Angeles, California based private investigator who comes out of retirement when his former partner, Harry Regan, shows up on his doorstep with a bullet wound to the gut and dies. Ira determines to find out who killed Harry and is then contacted by another long-time acquaintance, Charlie Hatter (a down-on-his luck Hollywood hack/bartender) about Harry's last case. Harry's client was Margo Sterling, a former client of Charlie's who is a flaky, penniless new-age actress, agent, and dress maker. She hired Harry to retrieve her missing cat, Winston, who is being held ransom by an acquaintance named Brian Hemphill who stole Winston because Margo was late on paying back a loan. Amidst all this, Ira has to figure out what would be the reason for someone to kill Harry.