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 |
| Editing | Charles Crichton | Editor |
| Art | C.P. Norman | Assistant Art Director |
| Art | Vincent Korda | Art Direction |
| Camera | Georges Périnal | Director of Photography |
| Directing | Geoffrey Boothby | Assistant Director |
| Production | Harold Boxall | Producer |
| Production | Josef Somlo | Producer |
| Sound | John Cook | Sound Recordist |
| Sound | Richard Addinsell | Original Music Composer |
| Camera | Robert Krasker | Camera Operator |
| Writing | Bruce Bairnsfather | Screenplay |
| Writing | Ian Dalrymple | Screenplay |
| Crew | Arthur Wimperis | Additional Dialogue |
| Writing | Derek N. Twist | Writers' Assistant |