The Panther's Claw (1942)

Stars: Sidney Blackmer, Rick Vallin, Byron Foulger
Director: William Beaudine

In the first of a planned series of films based on Foulton Osler's stories, finds Police Commissioner Thatcher Colt (Sidney Blackmer) and his aide, Anthony Abbott (Rick Vallin, using their usual methods of science and deduction, set out to solve the murder of an opera singer. This involves two wig-makers, an opera troupe, an announcement of a trip to South America, and an artful disguise.