Boyce and Stamps go with Barton on a road trip. Lolli offers Kim some child-rearing advice. Kim thinks that she could be pregnant.
As Miles, Monroe, Charlie and Connor rush to escape Austin, a confrontation with Texas Rangers separates Miles from the group. While out searching for Miles, Charlie is confronted by Neville who demands information on Jason's whereabouts. As a wounded Miles faces increasingly hopeless circumstances, Aaron learns that the nanotech has been busy.
Richard examines how accidents can occur while knocking down buildings, sledging and abusing airbags.
Riley tries to figure out who her biological father is and comes up with two candidates. Elsewhere, Tucker blames his dad for his parents' impending divorce, so Bonnie attempts to help by getting Tucker's father to be less rigid.
Richard uses science and home footage to reveal the humiliating and painful potential of riding a rodeo bull, and hanging upside down.
One castaway's bidding strategy at the Survivor auction could pay off for them. Meanwhile, castaways draw rocks for a huge advantage in the game, and another castaway decides to show off his idol in an attempt to ensure his safety.
While Bellamy tortures the Grounder, Raven and Clarke make contact with the Ark and ask Abby to help them save Finn. On the Ark, Kane deals with his guilt, and Jaha surprises the council with a shocking revelation.
Megan goes camping with boys without permission and the Koloff girls throw Teryn a bachelorette party. Taylor worries about losing both her parents after Ken's health scares while Kenny and Monique...
The Intelligence Unit works to find the bombers. Even with government agencies in the mix, Voight and his team work the case from their own angles and connections. Lindsay and Antonio question doctors who handled the transplant surgery for an Ambassador from Syria, but no clues emerge. Olinsky gets some solid intel and the team work from there. It’s a race against time as they realize there may be additional bombs targeted to detonate. Meanwhile Burgess sits vigil for her niece whose life hangs in the balance. The crossover starts on Chicago Fire S02E20 A Dark Day (I).
Gecko brothers and the Fuller family are watching the Santanico Pandemonium as Ranger Freddie Gonzalez shows up to exact revenge.
As Decima uses Samaritans feeds to hunt Reese and Shaw, Greer exploits Finchs greatest weakness in an attempt to lure him out of hiding: his love for his former fiance, Grace Hendricks.
Concerned about Warrens social life, Kate encourages him to make new friends and get involved in clubs or sports, however, it backfires and now she might have made things worse for him. Elsewhere, Hillary struggles with her art assignment and looks to Jackie for some creative guidance, and Pete teaches Bert the value of money.
Malvo flips the script on the blackmail operation, Molly sets a trap, and Gus debates whether he should come clean. Lester's return to work has complicated repercussions.
Lt. Casey and Dawson volunteer to help at a charity run at Chicago Medical when a massive explosion sends Chicago into chaos. With one of their own missing in the blast, the firehouse is tested like never before. The crossover continues on Chicago P.D. S01E12 8:30 PM (II)
With no one left to trust, Agent Maria Hill Cobie Smulders teams up with Coulson while S.H.I.E.L.D. is being destroyed.
Sergeant Cawood's world stops when the man who drove her daughter to suicide is released from prison, and Kevin's split-second decision devastates Nevison.