In a Halloween-inspired sequence, Beta unleashes terror on Alexandria.

It begins in the light of day.

Inside are two Whisperers waiting for his arrival.

Ryan Hurst as Beta

Credit: Jace Downs/AMC

They fire up the lid to a hole that drops Beta down into a tunnel beneath the ground.

He lights a lantern and begins his walk, one that will take him all the way to Alexandria.

He unsheathes his blades and the night of horrors begins.

Earlier in the day, Gamma/Mary arrived at Alexandria and the town is on the defensive.

So, they place her in the cell and press her for more information.

When she admits to killing her sister for Alpha, her tears convince Gabriel of her honesty.

Gabriel, however, is becoming erratic.

Pull teeth, slice fingers, he says.

Do whatever it takes for them to drop the act.

Gamma was the act.

Mary, now working with Alexandria to chart the location of the cave on a map, is reality.

She can’t trust what she sees half the time.

It becomes real for her later that night.

reaches Alexandria from a watchtower two miles out, warning that the Whisperers are sending a herd their way.

When they reach the watchtower, however, they realize it was just a trap.

The Whisperers led them away from Alexandria to leave them with little defenses.

The camera work inThe Walking Dead’s “Stalker” episode bears a similar style.

With Rosita and Laura busy fending off these walkers, Beta makes his way to Mary in the cell.

Laura gets the jump on him, holding Beta at ax point while Laura runs off to get help.

But, in a scuffle, Beta appears to kill Laura by sheer brute strength.

He pursues Mary, who’s now hiding in Judith’s home with her and A.J.

That’s when Judith shoots him through the door and is able to escape with A.J.

Of course, like Mike Myers himself, one bullet isn’t enough.

Beta was wearing a bulletproof vest.

He grabs at Mary’s legs, tripping her and slamming her head into the floor, stunned.

But now he has to face Rosita.

The two spar in the shadowed hallway and bedroom, bringing her past nightmares to life.

It looks as though Beta will claim her life, too, but Mary stops him.

The next day, Rosita leaves baby Coco with Gabriel as she departs for Hilltop for medical attention.

She brings Judith, Aaron’s daughter, and Mary with her.

The paranoia dissipates and she seems to welcome the reformed Whisperer into the community.

Daryl, meanwhile, has his own horrors to face.

He finds the cave entrance but there are too many Whisperers for him to safely enter.

He then sees Alpha leading walkers out of the tunnel in a single-file line.

He tracks them to a creek, where he attacks.

He first takes out the guards and then deals a blow to Alpha.

Alpha chases Daryl to a gas station, where he’s slowly bleeding out.

She, too, is becoming woozier by the minute.

Daryl, unable to lift himself from the ground, fends them off but passes out.

Alpha, too, becomes unconscious from blood loss.

They both come to that night when Lydia arrives.

Lydia has a chance to kill Alpha.

Alpha even puts the knife in her hand.

But she can’t bring herself to do it.

Lydia tells her she didn’t come for her, she came for Daryl.

Daryl wakes up the next morning and finds Lydia nursing him back to health.

Pain, she had said before, is what made her, what made her daughter.

Now, it has transformed her into “the end of the world.”