Season 4
The fourth season of The Twilight Zone aired Thursdays at 9:00–10:00 pm on CBS from January 3 to May 23, 1963. This season broke with the previous seasons in presenting hour-long episodes instead of the earlier half-hour episodes. A very different and more complex set of graphics was used for the intro, and Rod Serling's narration changed from the earlier seasons as well: "You unlock this door with the key of imagination. Beyond it is another dimension. A dimension of sound. A dimension of sight. A dimension of mind. You're moving into a land of both shadow and substance, of things and ideas. You've just crossed over into the Twilight Zone."
Episodes
1 In His Image Jan 3, 1963
2 The Thirty-Fathom Grave Jan 10, 1963
3 Valley of the Shadow Jan 17, 1963
4 He's Alive Jan 24, 1963
5 Mute Jan 31, 1963
6 Death Ship Feb 7, 1963
7 Jess-Belle Feb 14, 1963
8 Miniature Feb 21, 1963
9 Printer's Devil Feb 28, 1963
10 No Time Like the Past Mar 7, 1963
11 The Parallel Mar 14, 1963
12 I Dream of Genie Mar 21, 1963
13 The New Exhibit Apr 4, 1963
14 Of Late I Think of Cliffordville Apr 11, 1963
15 The Incredible World of Horace Ford Apr 18, 1963
16 On Thursday We Leave for Home May 2, 1963
17 Passage on the Lady Anne May 9, 1963
18 The Bard May 23, 1963