The crooks in London know how it works. No one carries guns and no one resists the police. Then a new gang appears that go one better. They dress as police and steal from the crooks. This upset's the natural order of the police/criminal relationship and the police and the crooks join forces to catch the IPOs (Impersonating Police Officers), including an armoured car robbery in which the police must help the gangs to set a trap.
Unfortunately the movie The Wrong Arm of the Law is not yet available on HBO Max.
| Writing | Alan Simpson | Writer |
| Writing | John Antrobus | Writer |
| Camera | Ernest Steward | Director of Photography |
| Editing | Tristam Cones | Editor |
| Writing | Ray Galton | Writer |
| Directing | Cliff Owen | Director |
| Camera | Ray Hearne | Still Photographer |
