Arby 'n' the Chief

Reapers (7x1)

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The episode opens with a glimpse of the future two months from the present, following a clan of trolls who infiltrate an online in-game memorial service for a deceased teenage Halo addict armed to the teeth with heavy weaponry with the intention of decimating it. The clan is also revealed to have a couple of unexpected members. In the present, tension between Cortana and Chief is sky high, and Arbiter undergoes a traumatic event.