X Minus One: C-Chute (February 8, 1956)

Mehr von George Lefferts - adaptation & Isaac Asimov

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  X Minus One: There Will Come Soft Rains - Zero Hour (December 5, 1956)

  Ray Bradbury & George Lefferts - adaptation

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  X Minus One: Cold Equations (August 25, 1955)

  Tom Godwin & George Lefferts - adaptation

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  X Minus One: A Pail of Air (March 28, 1956)

  Fritz Leiber & George Lefferts - adaptation

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  X Minus One: Zero Hour (November 23, 1955)

  George Lefferts - adaptation & Ray Bradbury

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  X Minus One: C-Chute (February 8, 1956)

  George Lefferts - adaptation & Isaac Asimov

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  X Minus One: Surface Tension (August 28, 1956)

  James Blish & George Lefferts - adaptation

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  X Minus One: Target One (December 26, 1957)

  Frederik Pohl & George Lefferts - adaptation

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  X Minus One: The Girls from Earth (January 16, 1957)

  Frank M. Robinson & George Lefferts - adaptation

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  X Minus One: Tunnel Under the World (March 14, 1956)

  Frederik Pohl & George Lefferts - adaptation

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  X Minus One: Universe (May 15, 1955)

  Robert A. Heinlein & George Lefferts - adaptation

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  X Minus One: A Wind Is Rising (October 3, 1957)

  Finn O'Donnevan & George Lefferts - adaptation