Some new friends and potential family members will be joining season 4 ofThis Is Us.

In honor of the Big 3 (Kevin, Kate and Randall Pearson)’s birthdays, NBC released the first teaser of the upcoming episodes of the decade-hopping family drama.

“It’s actually kind of terrifying, you know, how a single cross with one person you’ve never met can change everything,” she adds as flashes of new characters appear.

This Is Us/ Youtube

Mandy Moore

Jennifer Morrison

After she was confirmed as a recurring guest star in June, Jennifer Morrison is set to make her debut onTIUas a military woman. (Could she be a possible connection to Jack and Nicky’s past?) It was previously reported that she has a“substantial” rolethis season.

“I would say that there’s a lot of secret new cast members who are going to be a big deal, coming up,” co-creator Dan Fogelmanrecently saidabout the guest actors joining the show.

Other fresh faces jumping in season 4 areWhen They See Usstars Asante Blackk and Marsha Stephanie Blake, as well as Omar Epps, Bahara Golestani, Timothy Omundson, Julian Silva, Auden Thornton and Nick Wechsler.

And surprise! Director M. Night Shyamalan makes a cameo as well. Could he be working with Kevin on his new movie after landing a role in a Ron Howard World War II movie co-starring Sylvester Stallone?

Omar Epps

Asante Blackk

And some parents are back in the picture as Ron Cephas Jones returns as Randall’s dad in flashback scenes, Elizabeth Perkins will appear in the season premiere as Rebecca’s mother Janet Malone and Phylicia Rashad returns as Beth’s mom.

Marsha Stephanie Blake

M. Night Shyamalan

Also returning are Tim Jo as Randall’s political right-hand man and Caitlin Thompson as Kate’s best friend.

“If you think you know what’s coming next you don’t know us,” the trailer teases.

Season 4 ofThis Is Uspremieres on Sept. 24 at 9 p.m. on NBC.

source: people.com