The Late Show (1977)

Comedy/mystery from writer/director Robert Benton. Art Carney is an over-the hill private detective who teams up with scatterbrained washed-up actress Lily Tomlin to uncover who murdered his ex-partner. Very, well, "seventies", reveling in 1940s nostalgia that was so fashionable in 1977. It resembles Howard Hawks' "The Big Sleep", with snappy dialog, treacherous dames, and a confusing plot. A very nice way to pass ninety-three minutes.