- Author:
- Lyon Todd
- Adapter:
- Alistair Bell
- Costumes supervised by:
- Joyce Hawkins
- Make-up supervised by:
- Gwen Arthy
- Designer:
- Michael Edwards
- Script Editor:
- Betty Willingale
- Producer:
- Campbell Logan
- Director:
- Julia Smith
- Alexander Graham Bell:
- Alec McCowen
- Mabel Hubbard:
- Francesca Annis
- Mr. Hubbard:
- John Woodnutt
- Mrs. Connor:
- Elizabeth Begley
- Mr. Richards:
- George Woolley
- Mr. Orton:
- Alan Tilvern
- Elisha Gray:
- Warren Stanhope
- George Sanders:
- Michael Crockett
- Sarah Fuller:
- Susan Crawford
- Mrs. Hubbard:
- Mary Barclay
- Berta Hubbard:
- Judy Geeson
- Grace Hubbard:
- Jenny Agutter
- Jonas:
- Andre Dakar
- Mr. Sanders:
- Peter Carlisle
- Thomas Watson:
- Clive Endersby