Complex sentence: The theme of the novel is echoed in "The Invisibles", an episode of "The Outer Limits" aired in 1964, and also in "", the last episode of the first season of' in 1967.
Split into simpler sentences: The theme of the novel is echoed in "The Invisibles" an episode of The Outer Limits aired in 1964. Also, "", the last episode of the first season of' in 1967.