Season 1
The first season of The Twilight Zone aired Fridays at 10:00–10:30 pm on CBS from October 2, 1959 to July 1, 1960. There are 36 episodes, including the pilot, "Where Is Everybody?". The theme music for this season, written by Bernard Herrman, is different from the music most commonly associated with the series, written by Marius Constant for the second season onwards.
Episodes
1 Where Is Everybody? Oct 2, 1959 
2 One for the Angels Oct 9, 1959 
3 Mr. Denton on Doomsday Oct 16, 1959 
4 The Sixteen-Millimeter Shrine Oct 23, 1959 
5 Walking Distance Oct 30, 1959 
6 Escape Clause Nov 6, 1959 
7 The Lonely Nov 13, 1959 
8 Time Enough at Last Nov 20, 1959 
9 Perchance to Dream Nov 27, 1959 
10 Judgment Night Dec 4, 1959 
11 And When the Sky Was Opened Dec 11, 1959 
12 What You Need Dec 25, 1959 
13 The Four of Us are Dying Jan 1, 1960 
14 Third from the Sun Jan 8, 1960 
15 I Shot an Arrow into the Air Jan 15, 1960 
16 The Hitch-Hiker Jan 22, 1960 
17 The Fever Jan 29, 1960 
18 The Last Flight Feb 5, 1960 
19 The Purple Testament Feb 12, 1960 
20 Elegy Feb 19, 1960 
21 Mirror Image Feb 26, 1960 
22 The Monsters are Due on Maple Street Mar 4, 1960 
23 A World of Difference Mar 11, 1960 
24 Long Live Walter Jameson Mar 18, 1960 
25 People are Alike All Over Mar 25, 1960 
26 Execution Apr 1, 1960 
27 The Big Tall Wish Apr 8, 1960 
28 A Nice Place to Visit Apr 15, 1960 
29 Nightmare as a Child Apr 29, 1960 
30 A Stop at Willoughby May 6, 1960 
31 The Chaser May 13, 1960 
32 A Passage for Trumpet May 20, 1960 
33 Mr. Bevis Jun 3, 1960 
34 The After Hours Jun 10, 1960 
35 The Mighty Casey Jun 17, 1960 
36 A World of His Own Jul 1, 1960