Beckett is recruited to assist on a Narcotics investigation, but a routine mission turns deadly when an undercover operation goes awry. To survive, Beckett must engage in a battle of wits against some of the most dangerous men in the New York underworld – including a powerful enemy from her past.
On the morning of the wedding, Lily and Robin have a fight and Barney freaks out about which suit to wear. Meanwhile, the gang watches a movie Ted has forbidden them to see.
When an aggressive virus wipes out Gabriel’s memory, he thinks Jin Cong is good and helps him find a secret document.
Hart and Cohle call a truce to investigate a series of disappearances that may be related to the Dora Lange murder and the Tuttle family.
Tensions rise when Holmes and Watson are forced to partner with Gareth Lestrade, Sherlock’s former Scotland Yard colleague, on a bombing investigation.
The White House deals with a bombshell announcement from Sally Langston. Meanwhile, Olivia finds herself in a challenging new role.
Jeff helps Duncan romance Britta; Britta runs into some old anarchist friends and discovers they’ve moved on; Abed accidentally destroys some of Hickey’s drawings; Chang has a supernatural experience.
Luke competes against the son of Phil’s nemesis (Rob Riggle) in a wrestling match; Cam and Mitch ask Claire to pick up Lily from school without mentioning the recent lice incidence in her class; Gloria chaperones a field trip.
Frankie tries to persuade Mike to attend a dinner honoring his dedicated service at the quarry; Sue forms a plan to build connections between students; Axl hopes to track down a girl who left a message on his phone.
Oliver brings Sara into the Arrow team. Watching Oliver and Diggle spar with Sara and talk old scars, Felicity starts to feel left out. The team is investigating a villain named William Tockman, a.k.a. The Clock King, who is a brilliant thief armed with technology that can open any bank vault in Starling City. After The Clock King infiltrates the computer systems in the lair, Felicity feels pressure to prove her worth. When she gets a lead on Tockman’s whereabouts, she heads out without the team, putting her in peril. Meanwhile, Oliver throws Sara a welcome home party, but Laurel refuses to attend. After Lance makes his case for a family dinner, Laurel acquiesces, but when Oliver shows up with Sara, she loses her temper on both of them.