- Author:
- Josef Capek
- Author:
- Karel Capek
- Translated by:
- Paul Selver
- Adapted for television and produced by/Scenery and costumes designed by:
- Hal Burton
- Tramp:
- Patrick McAlinney
- Lepidopterist:
- Gerald Cross
- Clythie:
- Pamela Strong
- Otto:
- John Bennett
- Felix:
- Ronnie Stevens
- Iris:
- Elvi Hale
- Victor:
- Rex Robinson
- Chrysalis:
- Anna Cropper
- Mr. Beetle:
- Jack Rodney
- Mrs. Beetle:
- Gretchen Franklyn
- Male Beetle:
- Jack Smethurst
- Ichneumon Fly:
- Richard Wordsworth
- Larva:
- Katharine Newman
- Mr. Cricket:
- David Jarrett
- Mrs. Cricket:
- Angela Crow
- Parasite:
- Joby Blanshard
- Blind Ant:
- Jack Rodney
- First Engineer:
- William Devlin
- Second Engineer:
- Patrick Troughton
- Inventor:
- Rex Robinson
- Quartermaster General:
- Joby Blanshard
- Telegraph Officer:
- Jack Smethurst
- Journalist:
- John Bennett
- Philanthropist:
- David Jarrett
- Commander in Chief of the Yellows:
- Richard Wordsworth
- Messengers, soldiers, etc:
- Barry Jackson
- Messengers, soldiers, etc:
- John Scott
- Messengers, soldiers, etc:
- Ken Tyllsen
- Messengers, soldiers, etc:
- Esmond Webb
- Messengers, soldiers, etc:
- Arthur White
- Messengers, soldiers, etc:
- Arthur Wilman
- First Snail:
- Gerald Cross
- Second Snail:
- Elvi Hale
- Woodcutter:
- Joby Blanshard
- Aunt:
- Gretchen Franklyn
- Schoolgirl:
- Angela Crow
