"Castle" Season 6 Episode 11 is called "Under Fire." Castle and Beckett will be investigating an arson homicide case. In the episode, Ryan and Esposito get trapped in a burning factory. The sneak peek of "Under Fire" suggests that their chances of coming out of the building, alive, look bleak.
In the sneak peek video, Beckett wants Ryan and Esposito to check a factory and find out if someone suspicious has been seen around it. She and Castle visit a person who claims to just help fire enthusiasts. Beckett can be seen questioning him about a fire. The person had put the photograph of the fire on his site. It is related to the arson homicide case. He gets news alert about a fire in a factory. Beckett and Castle realise that it is the same factory that Ryan and Esposito went inside to investigate.
The sneak peek shows the fire-fighting team head telling Beckett and Castle that he cannot send one of his men inside until and unless the fire is more contained. He also adds that if the guys are in there, they are probably already gone. The sneak peek reveals unconscious Ryan and Esposito.
According to spoilers, while Ryan and Esposito are trapped inside the factory, Ryan's wife goes into labour. It is not sure whether Ryan will be able to hold his baby. "Not only does it look as though Ryan may not be there to watch the birth of his child," Seamus Dever had said to TV Guide. "He may not live to see the baby at all." TV Guide had reported that Lanie and Beckett will be at the side of Jenny when she goes into labour.
Official Synopsis of "Castle" Season 6 Episode 11, "Under Fire": "When Castle and Beckett discover that the victim of a building fire was actually shot to death, they get on the trail of a serial arsonist turned murderer. Meanwhile, Ryan's wife, Jenny, goes into labor, but disaster threatens to ruin the joyous moment."
"Under Fire" is scheduled to air on January 06, 2014.