[Taso]

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- I don't understand Hiro is determined to get revenge on Adam, right? So ok, he doesn't want to save his dad, whatever, but why not stick around for a couple more secs, freeze time again, and kill Adam?

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Don't think Hiro can kill Adam. From Highlander we know an immortal can only be killed by being beheaded by another immortal.

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Save the cheerleader, save the world.

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Only Claire can kill Adam. Hiro would need to freeze time on Adam to allow Claire to behead Adam.

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Claire's cut off her toe before and it regrew - I imagine it'd be the same with a head.