See the stars of Riverdale, This Is Us, Supernatural, and more at work

Mandy Moore was excited to get back to work with her This Is Us costars, including Milo Ventimiglia. “Mom and Dad are back shooting the very first scene of season 4. Can’t wait for you to see!” she exclaimed alongside this pic of her and her on-screen hubby.

The Walking Dead/Instagram

Collins also posted this snap of himself covered in fake blood. “Rough day at the office,” he quipped.

Sean Murray was definitely feeling the love from his NCIS castmates: “These ladies make me laugh.”

“weeeeee’reeeee baaaaaaaaaaaaack,” shared Mae Whitman along with a photo of her posing with her Good Girls costars Retta and Christina Hendricks.

That’s not Cobie Smulders’ twin, it’s her stunt double! The Stumptown star captioned the snap: “Night shoot with stunts. We got this….” 

Mädchen Amick, who plays Alice Cooper on the show, shared this snap from a season 4 table read following castmate Luke Perry’s death: “There was nothing but love, memories and mourning for our beloved Luke as we honor him in our first episode back.”

Roberto Aguirre-Sacasa/Twitter

Riverdale creator Roberto Aguirre-Sacasa posted this hot shot of KJ Apa from the TV show’s set: “And we’re back. Second day of shooting #Riverdale Season 4.” 

Apa showed the less glamorous side of his job with this hilarious pic of him getting his hair done before filming scenes: “How did I get here.”

Jesse Lee Soffer/Instagram

Jesse Lee Soffer couldn’t resist sneaking into this on-set snap with his Chicago P.D. costars Jason Beghe and Tracy Spiridakos. “Reeeeally proud of this photo bomb,” bragged Soffer.

Brandon Routh posted a pic of him and costar Nick Zano on the set of their superhero series sporting totally ’80s style. “1989 and there’s nothing to see here…,” he wrote.

To commemorate Supernatural Day, Jensen Ackles shared this emotional post: “As Supernatural day comes to an end…I’m happy to be surrounded by many of the people who have made it happen. Love you guys…and love this show. It has changed my life.” 

Sean Hayes shared this sweet picture of his castmates — joined by special guest star Demi Lovato — on the set of the NBC show. “What a bunch. And our bunch was made even better by having Demi Lovato joining our play pen,” he wrote. 

Marcus Scribner/Instagram

“First day back of season six ya’ll and i got hit with a 6 am call. Smoothie sipping is the only solution,” black-ish star Marcus Scribner wrote on Instagram back in August.

Melissa Benoist/Instagram

Melissa Benoist was so excited for season 5 of Supergirl that she had to share this snap of herself striking a pose. “It is time,” she wrote.

“We back we back we back! 3x,” David Lim captioned this photo celebrating season 3 of the crime drama with costars Kenny Johnson and Shemar Moore.

The official Twitter for ABC’s The Good Doctor shared this snap of the show’s stars — Paige Spara, Freddie Highmore, Antonia Thomas, Hill Harper, and Tamlyn Tomita — getting back to work in June: “The cast is starting to gather for #TheGoodDoctor #Season3!”