Episodes are listed in transmission order. Clicking the images on the right takes you directly to the episodes which are currently available on DVD - thse are also marked in bold below.
Cast lists for the missing episodes have the guest actors' portraits in sepia, with a tan border, to indicate those illustrated from other productions - actors portrayed from publicity material or screenshots of "The Avengers" are in black and white.
Nº is the transmission order number; production dates are unverified, but all the sources seem to agree on them.
| Nº | Episode | Produced | Aired |
|---|---|---|---|
| 1 | Hot Snow* | 30/12/60 | 07/01/61 |
| 2 | Brought To Book | 12/01/61 | 14/01/61 |
| 3 | Square Root Of Evil | 21/01/61 | 21/01/61 |
| 4 | Nightmare | 28/01/61 | 28/01/61 |
| 5 | Crescent Moon | 04/02/61 | 04/02/61 |
| 6 | Girl on the Trapeze* | 11/02/61 | 11/02/61 |
| 7 | Diamond Cut Diamond# | 18/02/61 | 18/02/61 |
| 8 | The Radioactive Man | 25/02/61 | 25/02/61 |
| 9 | Ashes Of Roses# | 04/03/61 | 04/03/61 |
| 10 | Hunt the Man Down# | 12/03/61 | 18/03/61 |
| 11 | Please Don't Feed The Animals | 30/03/61 | 01/04/61 |
| 12 | Dance with Death | 12/04/61 | 15/04/61 |
| 13 | One for the Mortuary | 26/04/61 | 29/04/61 |
| 14 | The Springers | 11/05/61 | 13/05/61 |
| 15 | The Frighteners* | 25/05/61 | 27/05/61 |
| 16 | The Yellow Needle | 08/06/61 | 10/06/61 |
| 17 | Death on the Slipway# | 22/06/61 | 24/06/61 |
| 18 | Double Danger# | 06/07/61 | 08/07/61 |
| 19 | Toy Trap# | 20/07/61 | 22/07/61 |
| 20 | The Tunnel of Fear# | 03/08/61 | 05/08/61 |
| 21 | The Far-Distant Dead# | 14/08/61 | 19/08/61 |
| 22 | Kill the King# | 30/08/61 | 02/09/61 |
| Actors' Equity strike interrupts programming | |||
| 23 | Dead Of Winter# | 07/09/61 | 09/12/61 |
| 24 | The Deadly Air# | 20/09/61 | 16/12/61 |
| 25 | A Change of Bait# | 27/09/61 | 23/12/61 |
| 26 | Dragonsfield# | 18/10/61 | 30/12/61 |
The 1961 Actors' Equity strike started in November and continued for five months. Production was suspended completely and the television stations, after an almost complete shutdown, started broadcasting previously recorded material. The last four episodes of the season fall into this category, all being broadcast in December 1961; the last of them being filmed a few weeks before the strike started.
By the time the strike lifted in April 1961, Ian Hendry had decided to leave the show and pursue a feature film career.
