 
     
        | Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S12E01 | Snap Decision | September 17, 1966 CBS | 45 | |
| S12E02 | The Goldtakers | September 24, 1966 CBS | 45 | |
| S12E03 | The Jailer | October 1, 1966 CBS | 45 | |
| S12E04 | The Mission | October 8, 1966 CBS | 45 | |
| S12E05 | The Good People | October 15, 1966 CBS | 45 | |
| S12E06 | Gunfighter, R.I.P. | October 22, 1966 CBS | 45 | |
| S12E07 | The Wrong Man | October 29, 1966 CBS | 45 | |
| S12E08 | The Whispering Tree | November 12, 1966 CBS | 45 | |
| S12E09 | The Well | November 19, 1966 CBS | 45 | |
| S12E10 | Stage Stop | November 26, 1966 CBS | 45 | |
| S12E11 | The Newcomers | December 3, 1966 CBS | 45 | |
| S12E12 | Quaker Girl | December 10, 1966 CBS | 45 | |
| S12E13 | The Moonstone | December 17, 1966 CBS | 45 | |
| S12E14 | Champion of the World | December 24, 1966 CBS | 45 | |
| S12E15 | The Hanging | December 31, 1966 CBS | 45 | |
| S12E16 | Saturday Night | January 7, 1967 CBS | 45 | |
| S12E17 | Mad Dog | January 14, 1967 CBS | 45 | |
| S12E18 | Muley | January 21, 1967 CBS | 45 | |
| S12E19 | Mail Drop | January 28, 1967 CBS | 45 | |
| S12E20 | Old Friend | February 4, 1967 CBS | 45 | |
| S12E21 | Fandango | February 11, 1967 CBS | 45 | |
| S12E22 | The Returning | February 18, 1967 CBS | 45 | |
| S12E23 | The Lure | February 25, 1967 CBS | 45 | |
| S12E24 | Noose of Gold | March 4, 1967 CBS | 45 | |
| S12E25 | The Favor | March 11, 1967 CBS | 45 | |
| S12E26 | Mistaken Identity | March 18, 1967 CBS | 45 | |
| S12E27 | Ladies from St. Louis | March 25, 1967 CBS | 45 | |
| S12E28 | Nitro! (1) (Tiger by the Tail) | April 8, 1967 CBS | 45 | |
| S12E29 | Nitro! (2) (Tiger by the Tail) season finale | April 15, 1967 CBS | 45 |