Director and writer
Dot size shows IMDb votes; lines are rolling five-film averages. Films with fewer than 1,000 votes are left out.
| The Ghost of St. Michael's | 1941 | · | 688 | as Will Lamb | Writer (not counted) |
| Black Sheep of Whitehall | 1942 | · | 385 | as Professor Davis, Director | Writer |
| The Goose Steps Out | 1942 | · | 580 | Director, as William Potts | Writer |
| My Learned Friend | 1943 | · | 457 | as William Fitch, Director | Writer |
