Old Bill has grumbled his way through the trenches of the First World War. Now it is the Second and, envious of his son, Young Bill, he decides to enlist. He finally enters the Pioneer Corps, which is based near his son. When Young Bill goes missing during a raid, Old Bill shows that there's still life in the old dog yet!
| Directing | Ian Dalrymple | Director |
| Sound | Muir Mathieson | Music Director |
| Sound | John Cook | Sound Recordist |
| Camera | Robert Krasker | Camera Operator |
| Editing | Charles Crichton | Editor |
| Directing | Geoffrey Boothby | Assistant Director |
| Art | C.P. Norman | Assistant Art Director |
| Production | Josef Somlo | Producer |
| Camera | Georges Périnal | Director of Photography |
| Art | Vincent Korda | Art Direction |
| Production | Harold Boxall | Producer |
| Sound | Richard Addinsell | Original Music Composer |
| Writing | Bruce Bairnsfather | Screenplay |
| Writing | Ian Dalrymple | Screenplay |
| Crew | Arthur Wimperis | Additional Dialogue |
| Writing | Derek N. Twist | Writers' Assistant |