| Series cast summary: |
 | Luther Adler | - | Voice of Sibelius 1 episode, 1965 |
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 | John Alexander | - | Himself - Performer 1 episode, 1965 |
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 | Richard Bonynge | - | Himself 1 episode, 1965 |
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 | Carolyn Coates | - | Herself - Narrator 1 episode, 1965 |
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 | Marilyn Horne | - | Herself - Performer 1 episode, 1965 |
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 | Urho Kekkonen | - | Himself - President of Finland 1 episode, 1965 |
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 | José Limon | - | Himself 1 episode, 1965 |
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 | Kaija Mahlamäki | - | Himself - Narrator 1 episode, 1965 |
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 | Terry McEwen | - | Himself - Host 1 episode, 1965 |
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 | Cambridge Festival Orchestra | - | Themselves 1 episode, 1965 |
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 | Joan Sutherland | - | Herself - Performer 1 episode, 1965 |
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 | William Ball | - | Himself - Narrator 1 episode, 1969 |
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 | Erich Leinsdorf | - | Himself - Conductor 1 episode, 1969 |
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