
Acting
From Wikipedia:
Neil John McCallum (1929–1976) was a British-Canadian actor. After attending the Guildhall School of Music and Drama in London, McCallum's first major appearance on stage was alongside Sam Wanamaker in The Rainmaker in the mid-1950s.[3] He appeared in British TV series in the 1950s, 1960s and early 1970s, including The Saint, Department S and UFO, and in films such as The Siege of Pinchgut (1959) and Dr. Terror's House of Horrors (1965).[4] He provided the voices of Dr Ray Pierce in the film Thunderbirds Are Go (1966) and an airport controller in the TV series Captain Scarlet …

Captain Scarlet vs. The Mysterons
as Delta-Tango 19 Pilot / Airport Controller (voice)

Quest for Love
as Jimmy

Moon Zero Two
as Space Captain

The Lost Continent
as First Officer Hemmings

Thunderbirds Are GO
as Dr. Ray Pierce (voice)

Dr. Terror's House of Horrors
as Jim Dawson

Catacombs
as Richard 'Dick' Corbett

Walk a Tightrope
as Counsel

The Longest Day
as Canadian Doctor (uncredited)

The War Lover
as Sully

The Protectors
as Bennett · 1 ep.

Jason King
1 ep.

UFO
as Carl Mason · 1 ep.

Department S
as Eddie Curtis · 1 ep.

The Expert
as Cooper · 2 ep.
The Jazz Age
as Dan · 1 ep.

Captain Scarlet and the Mysterons
as 2nd Policeman (voice) · 1 ep.

Espionage
as Bill Martin · 1 ep.

The Saint
as Ed Jopley · 1 ep.

Sir Francis Drake
as Sir Martin · 1 ep.