- Script Editor: Terrance Dicks;
- Writer: Malcolm Hulke;
- Produced by: Barry Letts;
- Directors: Paul Bernard and David Maloney (TARDIS scene at end of 6 only - uncredited);
- Designer: Cynthia Klujco;
- Incidental Music: Dudley Simpson;
| Channel | Episode | Title | Date | Viewers | Position |
| BBC 1 |
338 |
Episode One |
Sat 24 Feb 1973 |
2417:50 - 18:15 |
9.1M |
32nd |
| BBC 1 |
339 |
Epiode Two |
Sat 3 Mar 1973 |
317:50 - 18:15 |
7.9M |
53rd |
| BBC 1 |
340 |
Episode Three |
Sat 10 Mar 1973 |
1017:50 - 18:15 |
7.5M |
57th |
| BBC 1 |
341 |
Episode Four |
Tue 13 Mar 1973 |
1317:50 - 18:15 |
7.1M |
58th |
| BBC 1 |
342 |
Episode Five |
Sat 24 Mar 1973 |
2417:50 - 18:15 |
7.7M |
57th |
| BBC 1 |
343 |
Episode Six |
Sat 31 Mar 1973 |
3117:50 - 18:15 |
8.9M |
40th |
This programme has not been repeated.
- Royal Festival Hall, South Bank, London;
- Fullers Earth Works, Reigate, Surrey;
- Television Centre Studio not known;
This programme has not working titles
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