Films
Sing As We Go (1934) (screenplay with Gordon Wellesley)
Look Up and Laugh (1935) (screenplay)
We Live in Two Worlds (1937) (a documentary short subject, written and presented by Priestley)
Jamaica Inn (1939) (additional dialogue)
Britain at Bay (1940) (a documentary short subject, written and presented by Priestley) On Youtube: https://www.youtube.com/watch?v=iuCq4cdU4bg
They Came to a City (1944) (screenplay with Basil Dearden and Sidney Cole, based on his play; Priestly also appears as the story's narrator)
Last Holiday (1950) (screenplay and producer)
Television
You Know What People Are (1955)
Armchair Theatre: Now Let Him Go (ABC – 15 September 1957)
Doomsday for Dyson (Granada – 10 March 1958)
Out of the Unknown: Level Seven (BBC2 – 27 October 1966, adaptation of a story by Mordecai Roshwald)
The Wednesday Play: Anyone for Tennis? (BBC1 – 25 September 1968)
Shadows: The Other Window (Thames – 15 October 1975, co-written with Jacquetta Hawkes)
An Inspector Calls (several versions including BBC – 2015)
2018 version SAE Oxford - https://www.youtube.com/watch?v=zXT0FgfrQWM
1982 BBC version - https://www.youtube.com/watch?v=giW3d8hvyq4