|Vanessa Redgrave||Leonie Delt|
|David Warner||Morgan Delt|
|Robert Stephens||Charles Napier|
Volatile artist Morgan Delt returns to London after having been institutionalized, hoping to reconcile with his wife, Leonie . When he learns she is leaving him for art dealer Charles Napier, Morgan is determined to win her back. While stalking Leonie, Morgan becomes obsessed with Marxism and gorillas. In his new monkey costume, the artist begins a campaign of harassment against Leonie and Charles.