cast
- Guido Baumann Self - Host
- Theo Adam Self
-
Martina Arroyo
Self
-
Piero Cappuccilli
Self
-
Tatiana Troyanos
Self
-
Grace Bumbry
Self
-
Plácido Domingo
Self
- Sylvia Geszty Self
- Franz Crass Self
-
Walter Berry
Self
-
Fiorenza Cossotto
Self
-
Peter Schreier
Self
- Giuseppe Di Stefano Self
-
Tito Gobbi
Self
-
Ingeborg Hallstein
Self
-
Gwyneth Jones
Self
-
Mirella Freni
Self
- Roberta Peters Self