The kids search for Leslie and Alien Alex. Meanwhile, Leslie gives birth and Xavin fulfills her prophecy. The kids go head to head in a final battle against the aliens.

Desperate to save the parking lot where Trudy was killed from demolition, Monk enlists the help of a sympathetic councilwoman. But when she goes missing, Monk may be forced to deal with her hapless and incapable assistant.

While Carrie is near catatonic, Saul investigates her unsettling timeline; Brody makes final preparations for the Vice President's policy summit at the State Department.

Reese is out of his element when The Machine's latest number sends him to the suburbs, forcing him to play house and go undercover in an idyllic neighborhood.

A major figure in the case is dead from a suspected overdose, but Tao thinks he was murdered. A major revelation casts Mark Hickman's motives in doubt, and a new suspect emerges on the day of the memorial service for the original victims.

After a botched carjacking turns out to be something much bigger, Voight's unit goes toe-to-toe with a smart drug kingpin who only works with women. New recruit Vanessa Rojas struggles with the transition from undercover to Intelligence.

Dr. Lightman helps a woman with early-onset Alzheimer's Disease uncover a traumatic memory from her past, and in the process discovers that there may be an "Angel of Death" working in her health care facility.

Trapped and lost, Biff and Joe's friendship is tested. Frank can only help find them by revealing too much to people he can't trust.

Reese is out of his element when The Machine's latest number sends him to the suburbs, forcing him to play house and go undercover in an idyllic neighborhood.

Desperate to save the parking lot where Trudy was killed from demolition, Monk enlists the help of a sympathetic councilwoman. But when she goes missing, Monk may be forced to deal with her hapless and incapable assistant.

After a botched carjacking turns out to be something much bigger, Voight's unit goes toe-to-toe with a smart drug kingpin who only works with women. New recruit Vanessa Rojas struggles with the transition from undercover to Intelligence.

Dr. Lightman helps a woman with early-onset Alzheimer's Disease uncover a traumatic memory from her past, and in the process discovers that there may be an "Angel of Death" working in her health care facility.

While Carrie is near catatonic, Saul investigates her unsettling timeline; Brody makes final preparations for the Vice President's policy summit at the State Department.

The kids find themselves in an alternate dimension full of visions from their past. They must find their parents and Alex before time runs out. One person is left behind.

Gloria reasserts old power. Fenton is stunned to see his sons in the middle of secrets that he, too, has uncovered. Frank enters an uneasy alliance, and climactic events are set in motion.

Monk must reconcile reality with his fan-boy feelings toward an actress who starred as a child in a Brady Bunch-style sitcom in his youth after an attempt on her life.

The team has a new theory about the mysterious third gunman in the original shooting, which leads them to the discovery of who's dealing drugs out of the church. Meanwhile, the team discovers that Rusty's life has been threatened.

As a favor to detective Wallowski, Dr. Lightman investigates a fatal armed robbery of a barbecue restaurant owned by a man dying of cancer.

When The Machine gives Reese and Finch the number of a brilliant surgeon, they are forced to seek help from an unlikely source.

Months after undergoing Electroconvulsive Therapy, former CIA case officer Carrie Mathison has made strides towards mental health but her progress is threatened when an asset from her former life comes in from the cold.

After zeroing in on a suspect responsible for bioterrorism, the P.D. prepares to undertake their biggest manhunt yet. Upton is torn between helping track down the perp and providing emotional support to a scared young girl who needs her..

Elena sneaks into a masquerade ball hosted by the Greybournes; Roman searches Mrs. Ivey's apartment; Ginny confronts Elena about her identity.

The team has a new theory about the mysterious third gunman in the original shooting, which leads them to the discovery of who's dealing drugs out of the church. Meanwhile, the team discovers that Rusty's life has been threatened.

When The Machine gives Reese and Finch the number of a brilliant surgeon, they are forced to seek help from an unlikely source.

As a favor to detective Wallowski, Dr. Lightman investigates a fatal armed robbery of a barbecue restaurant owned by a man dying of cancer.

Months after undergoing Electroconvulsive Therapy, former CIA case officer Carrie Mathison has made strides towards mental health but her progress is threatened when an asset from her former life comes in from the cold.