Perry Mason S01 E28 The Case of the Daring Decoy

"Almost anyone is capable of a crime under certain circumstances."

Daniel Conway is involved in a vicious proxy war with Warner Griffith for control of an oil company. Conway's secretary, Rose Calvert, is spying for Griffith. When Rose is found dead, Conway fears he's being framed for murder and approaches Perry at a bar association dinner and asks for his aid.