Agents of S.H.I.E.L.D. Finale Video: 'Fallen Agent' Mystery Gets New Twist

Being the “fallen agent” is an actual cross to bear — and your latest theory about which of the Agents of S.H.I.E.L.D. will die is about to zag, courtesy of this sneak peek from the two-hour Season 3 finale.

When last we tuned into ABC’s already renewed Marvel drama, Elena aka “Yo-Yo” (played by Natalia Cordova-Buckley) paid a visit to Mack (Henry Simmons), to reflect on the day’s events, revisit the topic of having “faith” and then gift him with her cross necklace — which, as seen in a flash-forward, floating in the cabin of a vessel in outer space, marks our only clue as to who might die in the finale.

The two-hour season ender, titled “Absolution”/”Ascension,” promises “a showdown a season in the making” as S.H.I.E.L.D. takes on Hive. In the exclusive clip above, Mack puts the final touches on part of an elaborate trap designed to take down Hive. But as the scene unfolds, possession of the portentous necklace changes hands, seemingly removing Mack from the cross hairs. Maybe…?

Watch the sneak peek and then cast your vote for the “fallen agent.”

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