Over the course of one eventful evening, the anniversary celebration of the musical and romantic partners Aurelius Rex and Delia Lane, a jealous, ambitious drummer, Johnny Cousin, attempts to tear the interracial couple apart.
Patrick McGoohan
as Johnny Cousin
Keith Michell
as Cass Michaels
Betsy Blair
as Emily
Paul Harris
as Aurelius Rex
Marti Stevens
as Delia Lane
Richard Attenborough
as Rod Hamilton
Bernard Braden
as Lou Berger
Harry Towb
as Phales
María Velasco
as Benny
Dave Brubeck
as Himself - Piano
Charles Mingus
as Himself - Bass
Bert Courtley
as Himself - Trumpet
