- Author, "The Little Red Pony" (Merry-go-Round:
- When Uncle Klaas Fell Over): Mies Bouhuys
- Author, "The Little Red Pony" (Merry-go-Round:
- When Uncle Klaas Fell Over): Antonia Ridge
- Adapted by (Merry-go-Round:
- When Uncle Klaas Fell Over): C.E. Webber
- Music composed by (Merry-go-Round:
- When Uncle Klaas Fell Over): Rick Jones
- Music arranged by (Merry-go-Round:
- When Uncle Klaas Fell Over): Jonathan Cohen
- Producer (Merry-go-Round:
- When Uncle Klaas Fell Over): Dorothea Brooking
- Uncle Klaas:
- Charles West
- Aunt Mina:
- Una Brandon-Jones
- Rika:
- Sue Sylvaine
- Otto:
- Robin Davies
- Princess Rosalita:
- Nike Arrighi
- Mozo:
- Rick Jones
- Tonio:
- Charles Collingwood
- Zeppo:
- Anthony Collin
- Policeman Klomp:
- Will Stampe
- Author (Drama:
- Chips with Everything): Arnold Wesker