#3: The Time Tunnel
Hollywood often recycles props, and spotting them in The Time Tunnel adds an extra layer of enjoyment. Despite being one of Irwin Allen’s more obscure shows, it boasted elaborately designed sets that caught the eye.
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To cut costs, The Time Tunnel ingeniously utilized props from other Irwin Allen shows, such as Lost in Space. Observant fans might catch glimpses of the Lost in Space robot and the Seaview submarine from Voyage to the Bottom of the Sea in episodes.