As a new case comes to light, the intelligence unit searches for the source of ammunition meant to kill officers of the police department. Voight and his unit investigate a home associated with some major gangs. Meanwhile, Ruzek is encouraged to seek counseling for personal reasons. Halstead has some very unwelcome visitors from his past.moreless
Mary Margaret, David, and the Mother Superior try to find Rumplestiltskin's dagger before Regina and Cora do. Meanwhile, Hook travels to New York to find Gold and kill him. In the fairytale world, the Blue Fairy offers Snow White a chance to save her dying mother.moreless
With Catherine's father's wedding quickly approaching, his fiancee and the bridesmaids try to find Catherine a date for the wedding. Not wanting to be set up, Cat feels pressured to admit that she's seeing somebody and reveals to Vincent that she wishes he could be her date for the wedding. At the wedding, Cat learns some startling news about a research grant that Evan received to study the mutant DNA cells that have been turning up at local crime scenes. After Cat tells Vincent about Evan's theory of how the cells are evolving to become more animal-like and less human, she faces an unexpected detour that could change the course of their relationship. Meanwhile, Tess and Joe cross the line romantically, even though Joe is married.moreless
Annie heads to Israel when American technology is found in an Iranian missile. She teams up with Eyal Lavin to discover who leaked the technology.
Jim is forced to work with his former FDLE partner, convicted murderer Mike Ogletree, when a woman who came forward to clear a death row inmate is murdered. Florida's Attorney General has decided to go after the IRS agent who handled Callie's audit and they want her testimony. Although Callie is reluctant to take time off from work, she gets some supportive help from Miranda.moreless
While the team treats a marriage counselor whose personality seems at odd with his motivational message, House and his green-card wife Dominika try to fool Immigration.
While vacationing in Stockholm with Annie, Danielle is mistaken for a spy.
The leak of a CIA Trainee's name brings Annie back to The Farm with the sensitive task to find the culprit without being exposed herself which would end her own CIA career.