Randall and Hopkirk (Deceased) (2001)

Jeff Randall and Marty Hopkirk are Private Detectives until their partnership seems to be over,courtesy of a fatal hit and run accident involving Marty (Vic Reeves). However Marty comes back as a ghost to help his living colleague (Bob Mortimer) continue solving the various cases that they took on before the fatality.

The only person that can see and communicate with Marty is Jeff,and this leads to hilarious consequences where we frequently see Jeff talking to Marty,and then see it from an observers point of view and see Jeff apparently talking to himself.

Marty helps Jeff sometimes with his ghostly powers,such as sudden gusts of wind coming from nowhere etc.