"When Did You Start to Stop Seeing Things?" is the tenth episode of the 1969 ITC British television series Randall and Hopkirk (Deceased) starring Mike Pratt, Kenneth Cope and Annette Andre. The episode, directed by Jeremy Summers, was first broadcast on 23 November 1969 on ITV.

Synopsis

== Jeff is hired by a company to find out who is leaking information in the . Finding Jeff suspiciously out of character – and also now being unable to see him – Marty finds out that the real Jeff has been captured and that the fake Jeff is an impostor, using his status to conduct murders of financial personnel. Marty uses a to save the day.

Cast

Home media

The episode was released on VHS and several times on DVD with differing special features. A Blu-ray edition of this episode has been released by Network along with several significant episodes of several TV series of the 1970 era under the title Retro-Action 1 – The cool age of TV in High Definition.