The Boxwallah

Night is the Time For Killing

Thriller

Upstairs, Downstairs

The Abominable Dr. Phibes

The Main Chance

The Oblong Box

Please Sir!

The Coming Out Party

The Lift

The Likely Lads

The Gorgon

Man in the Middle

Crooks in Cloisters

The Beverly Hillbillies

The Brain

Out of This World

The Avengers

The Sundowners

Saturday Night and Sunday Morning

Hell Is a City

The Third Man

No Hiding Place

The Larkins

Alister Williamson (17 June 1918 – 19 May 1999) was an Australian-born character actor, who appeared in many British films and television series of the 1960s and 1970s. A big, craggy-faced man, he would usually be found playing gruff police inspectors or henchmen in adventure series and police dramas of the period. He was also notable as a supporting player in a number of classic British horror films.
He would typically be found in television series such as Adam Adamant Lives!, The Avengers, Paul Temple, Police Surgeon, Public Eye, The Saint, Softly, Softly, Special Branch, The Third Man and Z-Cars. He also made appearances in many popular sitcoms of the period, such as Please Sir!, Dad's Army, The Galton and Simpson Playhouse, George and Mildred, The Likely Lads, Man About the House and That's My Boy.
In films he often appeared in the horror genre, either as policemen or landlords for companies such as Hammer Studios, Amicus and AIP throughout the 1960s and early 1970s. His credits include The Curse of the Werewolf (1961), The Evil of Frankenstein (1963), The Gorgon (1964) and The Deadly Bees (1966). In 1969 he appeared in Gordon Hessler's The Oblong Box, in which he would have his only leading role opposite stars Vincent Price and Christopher Lee. In a part originally earmarked for Price, he played the disfigured Sir Edward Markham, acting underneath a red velvet hood until the film's climatic unmasking. Unfortunately his voice was deemed unsuitable and he was redubbed for the film's release, after which it was back to a supporting role in his next horror film, The Abominable Dr. Phibes (1971).