The Ghost & Mrs. Muir - Season 1 - Eps 4: The Ghost Hunter
Claymore brings a stranger to look at the house who claims he is a student of architecture and wants to take photos of the house. When he comes back to the house after the Muirs leave for the evening Captain Gregg thinks he's a burglar and tries to scare him away, not realizing that he is actually a parapsychologist who is determined to find the ghost of Gull Cottage and make him known to an unsuspecting public.
About The Ghost & Mrs. Muir

Title: The Ghost & Mrs. Muir
First Air Date: 1968-09-21
Last Air Date: 1970-03-13
Status: Ended
Rating: 6.4/10 (from 16 votes)
Language: EN
Seasons: 2
Total Episodes: 50
Network: ABC NBC
Genres: Sci-Fi & Fantasy, Comedy
Production Companies: Unknown
Synopsis
Derived from the 1947 movie with the same name, a house is haunted by a deceased sea captain who wreaks havoc with the new tenants who were not advised of his existence.
Cast

Edward Mulhare
Captain Daniel Gregg

Hope Lange
Carolyn Muir

Charles Nelson Reilly
Claymore Gregg

Reta Shaw