Dawson saves a young boy from an apartment fire. Kidd's idea for Molly's doesn't go as hoped. Severide hits a wall while advocating for new fire masks. Cruz and Brett utilize a secret weapon to get Otis to see Dr. Halstead take a blood test.
Zoom arrives back on Earth-1 intent on taking over Central City. Barry and Wells come up with a plan to stop Zoom once and for all but it’s extremely dangerous. Unsure if he should take the risk, Barry reaches out to both fathers for advice. Henry is adamantly opposed to Barry risking his life again but Joe thinks he can handle it which puts the two men at odds with each other. Meanwhile, Cisco is shocked when he vibes the Earth-2 villain Rupture, who happens to be his brother Dante’s doppelganger. Rupture came to this Earth seeking justice for Reverb’s death. Iris decides she’s finally ready to open up to Barry about her feelings for him.
When a 14-year-old foils a home invasion, Gibbs suspects the teenager is withholding pertinent details. Also, Director Vance and Senior FBI Agent Fornell travel to London as part of the ongoing escaped British spy case.
Rubble dreams about saving his idol, Apollo the Super-Pup, from an evil Spider King.
Jess meets Sam’s female best friend, Diane. Meanwhile, Nick is worried Gavin will disappoint Schmidt again and Winston is offended by a reaction to a birthday gift.
With the Final Round of the Judge's Audition comes the First Pressure Test, which involves a Shannon Bennett Chocolate Bar.
Jess races to make alterations to Cece’s bridal dress, while Schmidt tries to keep his “wedding workshop” a secret at work, and Nick struggles to ask Reagan to be his date to the nuptials. Meanwhile, Winston and Aly try to keep their relationship on the down-low at work.
When Stew learns that his father is guilty, he wants to settle, but Dean tries one of his old "Grinder" tricks to solve the case. Meanwhile, Stew is concerned that he is now "infected" by "The Grinder".
Alliances are tested as the remaining artists must tattoo in teams of three.
Jimmy plans an emotional memorial service while processing a painful loss. Meanwhile, Sara is faced with a difficult decision after Craig asks her to take the next step in their relationship.
The season’s worst storm yet slams the fleet. Freshmen Skipper Sean Dwyer must choose between crab & a childhood friend. Wild Bill questions his son's status as a crabber & man. As injuries stack up one deckhand reveals a painful secret in his pants.
Controversial videos featuring chaos inside the cordon sees Lex requesting reinforcements.
Dr. Rhodes and Dr. Downey clash over how to treat a patient with various health and heart issues. Meanwhile, excessive hoarding at a home comes into play when trying to help a man with a leg injury; a patient is bitten by her own dog; and a commission pays a surprise visit to evaluate the hospital.
Reese and Finch attempt to rescue the Machine’s source code before it deteriorates beyond repair. Also, Root fights for her life against an onslaught of Samaritan’s agents and Fusco is faced with hard questions following the deaths of Dominic and Elias.
Strange sightings in the Bermuda Triangle and a massive tsunami that disappeared.
Jenna volunteers to babysit, and receives some unexpected help in Matty. Meanwhile, Lissa learns the secret to being a Palos Hills mom, and Tamara and Sadie are in over their heads at a rich-kid clambake.
When a bright, young lawyer is found dead, the team suspects she was murdered because of a case she was working on. After theorizing the lawyer was killed because she discovered something criminal about her firm’s high profile client, the team heads to the firm to interview her four ambitious coworkers, each of whom seems more suspicious than the last. While at the firm, Maggie crosses paths with a former college boyfriend who may be closer to the murder than she’d like to admit. Meanwhile, Camille’s interactions with Liam take a surprising turn, and Kirsten learns something shocking during the stitch.
Hitler transformed his Alpine retreat in Bavaria into a fortified fiefdom, home to 2,000 SS troops and protected by a high level security system.