Source list starting with O:

Occult Experience, The Odessa File, The Office Space Oliver Twist Omega Code, The Omega Man, The Omen II: Damien Omen III: The Final Conflict Omen, The On the Beach One Flew Over The Cuckoo's Nest One Million Years B.C. One, The Oppenheimer, Robert (Scientist) Orgazmo Orlando Orpheé Osterman Weekend, The Others, The Our Man Flint Out of the Dark Outbreak Outer Limits, The (TV Series) Oz (TV Show)