As Chicago Fire fans wait for season 2 to continue in January, some of the cast has posted photos teasing the upcoming episodes.

Jesse Spencer, who plays the lead character Matthew Casey, posted a Twitter photo on Dec. 12 with the caption, "Don't mess with the mudatruckers."

Two days later he also posted a snowy photo of some of the cast wrapping up an episode at 4 a.m.

It can be presumed by Spencer's Twitter pictures that he will recover from the accident that sent him to the hospital in the last episode, titled "Not Like This."

Taylor Kinney, who plays Kelly Severide on the show, also posted some of his own photos on social media.

In one picture, some of the cast sat inside a fire truck. He captioned the shot: "Squad, Truck, even Chief Boden can't stay outside the new whip!"

Kinney uploaded another picture, in which the crew stands outside in the snow.

"Some of the gang, @randyflagler with the magic streak," he wrote as the caption.

In another shot, retweeted by Randy Flagler (Capp), cast member Eamonn Walker (Chief Wallace Boden) posed with Kinney and his girlfriend Lady Gaga.

Chicago Fire's midseason premiere is airing on Jan. 7, 2014 at 10 p.m. on NBC.

Scroll through the gallery to see the Chicago Fire Twitter photos.