Appearing in "Threshold"
- Harlan Clooney (First appearance)
- Detective Burton (First appearance)
- Jack (First appearance)
- Agent Ted Kendrick (First appearance)
- Edward Sands' estate
- Indianapolis (Mentioned only)
- Rocky Mountains (Mentioned only)
Synopsis for "Threshold"
At Edward Sands' estate, the team gets the news and Marlon flies the team out to Ohio. Brenda speculates that the human has been rotated through the fourth dimension. At a nearby prison, Harlan Clooney intimidates his guards.
Clay drives the Challengers into a fourth dimension event in progress but they are unable to stop it from happening. His body turns into a portal into another dimension, sucking up passersby, including Marlon before imploding. The rest of the team goes back to their hotel and finds Marlon standing outside, claiming that he just took a nap after fighting the inside-out monster. Kenn suggests that he may have been in two places at once—ever since the four of them survived a plane crash, they have been beset by weird events.
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- No trivia.
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