Currently available on 2 streaming services.

Quintet - watch online: streaming, buy or rent

You can buy "Quintet" on Amazon Video, Apple TV as download or rent it on Amazon Video, Apple TV online.

Cast

Paul Newman
Essex
Vittorio Gassman
Saint Christopher
Fernando Rey
Grigor
Bibi Andersson
Ambrosia
Brigitte Fossey
Vivia, Essex's Wife
Nina van Pallandt
Deuca
Craig Richard Nelson
Redstone
David Langton
Goldstar
Thomas Hill
Francha
Monique Mercure
Redstone's Mate
Maruska Stankova
Jaspera
Michel Maillot
Obelus
Max Fleck
Wood Supplier
Françoise Berd
Charity House Woman
Emil Glassbourg
Lost Soul (uncredited)