This is like the pre-credits sequence of every horror movie, he's probably going to be eaten before the main character is even introduced.

Derek is being pressured by his family to pick a mate, and somehow stumbles into a choice that they didn't expect and aren't sure they approve of....

The five times Derek called the Sheriff "Dad" on accident and the first time he did it on purpose.

“What are you trying to do?” Lydia asks finally. “Fix Derek,” Stiles says, not bothering to dissemble – Lydia's been lied to enough. “You know, before someone or something else tries to use him.

“Yes,” Dad says, tone matching Stiles’ exactly. “Because I’ve gone bra shopping so many times, I’m practically a pro.” -- Or the one where Stiles is a girl and nothing really changes.

They find the baby under a butterfly bush, a sweet smelling buddleja with purple flowers and narrow, green leaves. The baby is dirty, wet and hungry, wrapped in a fur blanket, and this close its squalling is loud enough to wake the dead. -- Or the one where Stiles' mom was a harpy and passed certain genes along.

Stiles runs away from his old pack on a Monday. He meets his dad for the first time on a Sunday, and he falls in love on a Thursday.

Derek thinks that the mating rituals are overly romanticized bullshit, but claiming a mate and defending them from challengers is something werewolves do, and his pack can't afford to appear weak after the fire. Especially not when Deucalion and his friends are in town for the rituals. Enter Stiles Stilinski, who offers to let Derek claim him so he won't be overrun at the ceremonies. Nothing goes as expected.

After the events with Deucalion and Jennifer Blake, Derek goes on a search for his biological family. He, Stiles, and Cora head to New York City to try to find the family he doesn’t remember. It turns out that there was a lot to his adoption that he never knew.