Mark Douglas is being threatened by a man named
Ronnie Fowler.He has his sister steal him a tape
of aircraft builder Peter Heywood who has had
his conversation with psychiatrist Dr.David Craig.
Craig is very angry at this and threatens
Douglas.He then learns that Douglas has copied
the tape and is blackmails Peter Heywood's wife
and him.After Douglas is found murdered,Dr.Craig
is charged with his murder and Perry Mason
comes to the rescue.
An intriguing and good episode.