The Bletchley Circle: Season 2, Episode 4 - ProjectFreeTV

2 - 4: Uncustomed Goods, Part 2

The girls inform the police tabout Jasper's murder and the next morning Ben informs Lucy that the tip off was wrong, there was no dead body and somebody managed to get there first. The girls conclude that there must be corruption in the vice squad so and they decide that catching them red handed is the only option.