Discover
Original Release
01/04/1971
Cast
| Name | Character |
|---|
| John Paul | Dr Spencer Quist / Dr. Spencer Quist |
| Simon Oates | Dr. John Ridge |
| Joby Blanshard | Colin Bradley |
| David Buck | Isaac Prentice |
| Geoffrey Chater | Mullery |
| George A. Cooper | Thomas Prentice |
| Shelagh Fraser | Joan Prentice |
| Geraldine Sherman | Alice |
| Robert Sansom | Dr. Somerville |
| George Waring | Busby |
Directors
Writers
Gerry Davis, Louis Marks, Kit Pedler
Cast
| Name | Character |
|---|
| John Paul | Dr Spencer Quist / Dr. Spencer Quist |
| Simon Oates | Dr. John Ridge |
| Joby Blanshard | Colin Bradley |
| David Buck | Isaac Prentice |
| Geoffrey Chater | Mullery |
| George A. Cooper | Thomas Prentice |
| Shelagh Fraser | Joan Prentice |
| Geraldine Sherman | Alice |
| Robert Sansom | Dr. Somerville |
| George Waring | Busby |
| Rachel Treadgold | Miss Marshall |
| Charles Rea | Inspector |
| Geoffrey Davion | Islander |
| Guy Graham | Islander |
| Rosemary Banks | Woman |
| Leslie Bates | Man |
| Willy Bowman | Man |
| Betty Cameron | Woman |
| Rodney Cardiff | Man |
| Reg Cranfield | Man |
Producers
| Name | Role |
|---|
| Terence Dudley | Producer |
