Relaxation is the 20th episode in the series.

Plot synopsis

Martin's obsessive behaviour is wearing Ann down even more than usual and causing her to lose sleep. She brings in Paul to teach Martin some relaxation exercises, as well as getting him to discard all unnecessary paper work. It works a treat and Martin is finally more chilled out - and even friskier - than he has ever been - until a fraught drive to the airport with Howard and Hilda undoes all the good work.