| 15x09 Image of the Fendahl, Part One | 29/10/1977 |
| 15x10 Image of the Fendahl, Part Two | 05/11/1977 |
| 15x11 Image of the Fendahl, Part Three | 12/11/1977 |
| 15x12 Image of the Fendahl, Part Four | 19/11/1977 |
| 16x01 The Ribos Operation, Part One | 02/09/1978 |
| 16x02 The Ribos Operation, Part Two | 09/09/1978 |
| 16x03 The Ribos Operation, Part Three | 16/09/1978 |
| 16x04 The Ribos Operation, Part Four | 23/09/1978 |
