Season 2 aired between 15 Sep 1967 and 29 Mar 1968, 26 episodes.
Episodes
E01
Amok Time
15 Sep 1967
E02
Who Mourns for Adonais?
22 Sep 1967
E03
The Changeling
29 Sep 1967
E04
Mirror, Mirror
06 Oct 1967
E05
The Apple
13 Oct 1967
E06
The Doomsday Machine
20 Oct 1967
E07
Catspaw
27 Oct 1967
E08
I, Mudd
03 Nov 1967
E09
Metamorphosis
10 Nov 1967
E10
Journey to Babel
17 Nov 1967
E11
Friday's Child
01 Dec 1967
E12
The Deadly Years
08 Dec 1967
E13
Obsession
15 Dec 1967
E14
Wolf in the Fold
22 Dec 1967
E15
The Trouble with Tribbles
29 Dec 1967
E16
The Gamesters of Triskelion
05 Jan 1968
E17
A Piece of the Action
12 Jan 1968
E18
The Immunity Syndrome
19 Jan 1968
E19
A Private Little War
02 Feb 1968
E20
Return to Tomorrow
09 Feb 1968
E21
Patterns of Force
16 Feb 1968
E22
By Any Other Name
23 Feb 1968
E23
The Omega Glory
01 Mar 1968
E24
The Ultimate Computer
08 Mar 1968
E25
Bread and Circuses
15 Mar 1968
E26
Assignment: Earth
29 Mar 1968