Jenkins is a non-canonical character created for the 2013 ITV adaptation of Greenshaw's Folly. He is a police constable who Inspector Welch left at Greenshaw's Folly with instructions to keep watch over the place while he was away. The actor who portrayed Jenkins is not credited.
Towards the end of the episode, Jenkins goes missing. Sergeant Cayley later finds Jenkins all tied up and gagged in one of the outbuildings of the estate. Philip Oxley had knocked him out and bound him because he wanted to gain access to the house to kidnap his son.