John Wynn is an actor, and also worked in lighting and sound.
Storm Over the Nile
as Sergeant
The Quatermass Xperiment
as Detective Sergeant Best
The Saint's Return
as Man
Over the Garden Wall
as Tony Harrison
They Were Not Divided
as '45 Jones
The Chiltern Hundreds
as Second Guardsman
Undercover
as Yugoslav Soldier (uncredited)
Millions Like Us
as Squadron Leader
