Scott tries a dangerous ritual in order to thwart Deucalion.

Allison, Stiles and Scott are in a white room with the Nemeton. 

Scott remembers his first night, in the woods, when he was bitten.

His tattoo jogs his memory.

Stiles sees his he and his father.

Allison remembers driving with her mother almost killing Scott

They were out for 16 hours and the full moon rises in less than four.

Scott still wants to team up with Deucalion, and Deaton agrees with him.

Scott, Allison and Isaac go to Allison's house to pick up a scent and find Scott's dad there.

While confronting Lydia and Aiden, Jennifer shows up to fight Kali.

Stiles wrecks his jeep.

Jennifer kills Kali and then the combo package of Ethan/Aidan as one in an instant.

Allison pulls a smoke grenade on Scott's dad and friends.

Jennifer makes Lydia scream.

Jennifer wants Derek to be her guardian while she kills Deucalion and she'll let everyone live.

As Allison and Isaac reach the Nemeton the land around it begins to collapse.

Ethan and Aiden are not dead.

Derek is powerless against Deucalion, as is Jennifer.

Deucalion tries to convince Scott to become a killer.

Deaton, Lydia and Cora fight to save Aiden and Ethan.

Scott uses light to fight against Deucalion just before the eclipse occurs.

Everyone in the Nemeton fights to save it from collapsing as Stiles arrives with an aluminum bat to save the day.

Jennifer heals Deucalion, makes him see her for who she was and she loses her power to kill him.

Jennfer is angry when Derek won't kill Deucalion.

Jennifer throws up a wall, which Scott punctures, allowing Deucalion to kill Jennifer.

Derek and Scott let Deucalion go, hoping he will once again be a man of vision.

Everyone is rescued.

Allison and her dad make a pact to work together and protect those who cannot protect themselves.

Scott's father decides to stay.

The kids return to school, and are just kids again.

Jennifer reaches the Nemeton, hoping it will once again save her. Peter cuts her down and declares he has always been the alpha.