William Shatner thought 'Twilight Zone' episode was 'worst thing' he's ever done

Before he played James T. Kirk on "Star Trek," William Shatner flew the unfriendly skies in the "Twilight Zone" episode, "Nightmare at 20,000 Feet." The actor tells Yahoo Entertainment he didn't think the segment was going to be a success after seeing his costumed co-star, "There were times I looked at it and I thought, 'This may be the worst thing I've ever done.'"

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