'This Is Us' Stars Promise Remainder of Season Is 'Special' -- Watch Heartbreaking New Footage!

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This Is Us
is back in a couple of days, and the stars are counting down its return!

NBC’s breakout family drama left viewers hanging with a heart-stopping cliffhanger, when Kate’s on-again beau, Toby (Chris Sullivan), unexpectedly collapsed on Christmas night following a Pearson family gathering.

RELATED: 19 Heartbreaking 'This Is Us' Moments That Made Us Cry So Far

“Was that not devastating?!” Chrissy Metz told ET’s Carly Steel on the set of This Is Us in December.

No matter what happens to Toby, his unexpected heart attack changes Metz’s character, Kate, for the long haul.

“You know, you’re going to just have to tune in and find out. Luckily, it’s not too far away,” Metz assured. “But it’s very unexpected. You’re not going to have to wait very much longer, so don’t worry!”

RELATED: 'This Is Us' Fall Finale Ends on a Heart-Stopping Moment

As for how fans may feel in the aftermath of Toby’s collapse, the 36-year-old actress hoped the winter break gave viewers a chance to grieve.

“Right now, they’re very upset, so I’m hoping that they’ll feel a little bit better,” Metz said, adding of Toby’s fate and future: “It’s very uncertain. We don’t know what’s going to happen.”

For his part, Sullivan was coy about the future of his character, sharing very little in the newly released This Is Us featurette. In new footage from Tuesday’s winter premiere, the Pearsons and their extended families are seen receiving news regarding Toby at the hospital, and it doesn’t look good, based off of Kate’s reaction.

RELATED: 'This Is Us' Star Milo Ventimiglia on What's Next: 'Invest in Tissues'

“Yeah, we left Toby at an interesting kind of limbo,” Sullivan said.

Sterling K. Brown
recalled a few interactions he’s had with fans, sharing in the featurette, “A few people have asked me, like, ‘You didn’t kill Toby! I can’t believe this!’ And I was like, ‘Do you want me to tell you? Or do you just want to watch?’”

“The way in which the public has responded to the show, they can’t help but tell you how much they love it and how meaningful it is to them,” Brown said. “If folks have enjoyed the first half of This Is Us, I think we got something special for them on the back end.”

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While This Is Us isn’t afraid to tug at your heartstrings and make you reach for that Kleenex on a weekly basis, Milo Ventimiglia told ET on the This Is Us set that that’s not about to change in the final eight episodes.

“Oh man. Invest in tissues. Just invest in tissues. Maybe a warm blanket. Get a wine subscription,” Ventimiglia said. “Just be open and ready for what we have coming your way. There's some beautiful scripts coming out and some beautiful work coming out. It's all very exciting.”

This Is Us
returns Tuesday, Jan. 10 at a special time, 10 p.m. ET/9 p.m. PT, on NBC.