Endeavour: Season 5, Episode 4

5 - 4: Colours

A photoshoot on an army base turns sinister when one of the models is found dead, and the investigation is complicated when Sam Thursday is revealed to be involved. With Thursday side-lined by protocol, Endeavour and Strange take the lead on the investigation for the first time without their mentor. Tensions rise, and the pair clash as their differing opinions push their friendship to breaking point.