Peeper

In 1947, a smart-mouthed Brit working in L.A. as a private eye (or peeper) is on a case to find the long lost daughter of a shady client pursued by two dangerous goons. The case leads him to a rich oddball Beverly Hills family.

Peeper is a 1975 mystery crime movie directed by Peter Hyams, starring Natalie Wood, Michael Caine, Michael Constantine. It holds an IMDb rating of 5.6/10 from 1,047 votes and runs 1h 27m.