The Third Visitor - Cast

Name	Known for
Sonia Dresdel Steffy Millington Steffy Millington See fewer	The Fallen Idol (1948)
Guy Middleton Inspector Mallory Inspector Mallory See fewer	The Happiest Days of Your Life (1950)
Hubert Gregg Jack Kurton Jack Kurton See fewer	Legend (I) (2015)
Colin Gordon Bill Millington Bill Millington See fewer	The Pink Panther (1963)
Karel Stepanek Richard Carling Richard Carling See fewer	The 2nd Best Secret Agent in the Whole Wide World (1965)
Eleanor Summerfield Vera Kurton Vera Kurton See fewer	Department S (1969)
John Slater James Oliver James Oliver See fewer	Othello (1946)
Michael Martin Harvey Hewson (as Michael Martin-Harvey) Hewson (as Michael Martin-Harvey) See fewer	Mutiny on the Elsinore (1937)
Cyril Smith Detective Horton Detective Horton See fewer	The Frog (1937)
John Adams Doorman (uncredited) Doorman (uncredited) See fewer	Tons of Trouble (1956)
Arthur Denton Dr. Venner (uncredited) Dr. Venner (uncredited) See fewer	The Remarkable Mr. Kipps (1941)
David Keir Horobin (uncredited) Horobin (uncredited) See fewer	The Arsenal Stadium Mystery (1939)