Randall and Hopkirk (Deceased) (1969)

S1E3 All Work and No Pay

The Foster Brothers, a pair of quirky con artists, pose as mediums to persuade Jeannie that her brother Marty is returning as a mischievous poltergeist. Armed with various gadgets, they set out to convince her of his supernatural presence, leading to a series of chaotic and comedic encounters as Jeannie grapples with their dubious claims.