Dir: Pat Jackson
Starring: Alan Dobie and Delphi Lawrence

After being left seven keys in the will of a dead former inmate, an ex-con goes in search of hidden loot

This crime film may have been a low-budget second feature but it is a brilliantly worked and intelligent little drama. It features a scene filmed on Du Cane Road outside HMP Wormwood Scrubs with an extremely brief glimpse of a Central Line train passing on the adjacent embankment.

As John Carson and Alan Dobie discuss their next plan, a Central Line train just creeps into shot towards the top left of the windscreen. This would almost certainly have been a train of 1959 stock drafted in to temporarily work services before the introduction of the 1962 stock trains that became synonymous with the line.