Mo Gallini

When an ER physician is gunned down in the street, Castle and Beckett soon discover that the victim was a mob doctor to a Mafia family run by an old friend of Castle's. Also, against this backdrop of Christmas, Esposito and Lanie reach a defining moment in their relationship.

Dhan spearheads the search for a missing unhoused man who's been an integral part of a tight-knit encampment; when Detective Trent shares troubling news about Sir, Gabi goes to great lengths to protect her secret.

For the firefighters, rescue squad and paramedics of Chicago Firehouse 51, no occupation is more stressful or dangerous, yet so rewarding and exhilarating.

Scully pursues a photographer who can seemingly predict the deaths of other people.

After Air Force One is shot down in the desert, Jack's only hope of keeping the "nuclear football" out of the hands of the terrorists comes from two campers who saw the plane go down.

Peter is deeply upset when a young victim is discovered at the site of a train accident; an abusive mother takes dire actions; Severide's injury is aggravated.