Madison, Strand and Daniel have fought together and watched their families die side-by-side since the apocalypse began.

But was their alliance ever more than a necessity based on survival?

In Part 1 of the Fear the Walking Dead Season Finale, the dam is under attack and the loyalties of the group are put to the test.

Watch Season 3, Episode 15 "Things Bad Begun"

The Proctors have launched a brutal invasion, aiming to seize the water supply for their own and kill anyone who stands in their way.

Rather than unite to fight off their enemies, the group must question whether they're truly on the same side.

Will they kill each other before the Proctors even get their chance?

Watch the episode now on amc.com and AMC apps for mobile, XBox One, Apple TV, Roku and Chromecast.

Part 2 of the Season Finale is also available on amc.com and AMC apps for mobile, XBox One, Apple TV, Roku and Chromecast.

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