| 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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