Tyler Hoechlin, Teen Wolf

Big things are afoot in Beacon Hills in Season 5, and we're not talking about the literal monsters that have become commonplace over the last four seasons on MTV's supernatural drama Teen Wolf. We're talking about senior year!

Stiles (Dylan O'Brien) is dead set on making sure everyone sticks together and no one, not even his trusty Jeep, gets left behind in Beacon Hills when the year is over. But even as the pack gets ready to take on new villains the Doctors, the series is also careful not to lose sight of the friends who are no longer around.

We already know that Aiden (Max Carver) makes a surprising appearance in the premiere, but the spirit of Derek Hale (Tyler Hoechlin, who opted not to return as a regular this season) will make its presence known by the end of the hour too.

And it might not be the only reason you're left crying by the end of the intense first half of the two-night season premiere.

Check out all this week's Mega Buzz!

Teen Wolf returns Monday, June 29 at 10/9c on MTV.

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