| Cast in order of appearance | played by: |
| Water | Melanie Evans, Julie Latham, Wendy Collins, Helen Wharam, Wendy Morris |
| Jason | Vanessa Blundell |
| Old Woman | Miles Spencer |
| King Pelias | Sara Nicholson |
| Guards | Andrew Wharam, Hugh Knopf, Lance Andrews |
| Argonauts... | |
| Hercules | Richard Archer |
| Persephone | Miffy Bartlett |
| Circe | Christine Gibbings |
| Atlanta | Melanie Goddard |
| Argus | Toby Manns |
| Orpheus | Andrew Perkins |
| Lyceneus | Jonathan Perkins |
| Talking Oak | Kim Spencer |
| King Aeetes | Stephen Curnow |
| Medea | Julie Latham |
| Servant | Melanie Evans |
| Bulls | Christopher Archer, Keith Benham |
| Serpent | Adrian Clarke |
| With guest appearances from the Maskers: | |
| The Giants | Graham Buchanan, Pete White |
| Cyclops | Pete White |
| For the Maskers | |
| Directed by | Judi Goddard |
| Sound Design | Geoff Grandy |
| Sound Operator | Geoff Wharam |
| Lighting designer and operator | Ivan White |
| Costume Adviser | Ann Archer |
| Set Design and construction | Ron Tillyer and Ken Spencer |
Judi Goddard would like to express her special thanks to Carol Willis and Jane O'Sullivan for their invaluable time & assistance.