12 O'Clock High official wallpaper
12 O'Clock High poster

12 O'Clock High

(1964)

Seasons

12 O'Clock High Season 1 poster

Season 1 (1964)

with 32 episodes premiered on September 18, 1964

12 O'Clock High Season 2 poster

Season 2 (1965)

with 29 episodes premiered on September 13, 1965

12 O'Clock High Season 3 poster

Season 3 (1966)

with 17 episodes premiered on September 9, 1966