With Nora gone, Eph reluctantly joins Setrakian’s quest in hopes of gathering enough evidence to warrant a citywide quarantine. Fet encounters the unexpected inside the subway tunnels, and a medical…

Eph and Nora fight to save Captain Redfern’s life before coming face-to-face with the horrifying effects of the virus. A spike in rat attacks signals Fet that something inexplicable is…

The four survivors begin manifesting strange symptoms, but Eph and Nora’s attempt to quarantine them is thwarted as the disinformation campaign begins. Meanwhile, in jail, Setrakian receives a surprise visit…

Jack baits Fayed with Gredenko, while the President faces a challenge to his office.

Jack enlists the help of an autistic man in the search for Gredenko, and Sandra Palmer makes a fateful decision.

CTU’s satellite tracking system is compromised as a bomb-carrying drone heads toward an unknown city. Meanwhile, US forces prepare for a nuclear retaliation on the Middle East.

Family troubles: Jack with his brother and father while Morris worries about his own brother.

Jack finds himself confronting his father while the lead terrorist needs help if he’s to explode the remaining bombs.

Four more “suitcase nukes” are out there, and Jack’s only lead takes him to the home of his brother.

While Jack has problems with Curtis, CTU discovers a nuclear threat and raids a terrorist warehouse, and a shocking explosion shakes LA.

Jack and former terrorist leader turned peacemaker, Hamri Al-Assad, track a suspicious man to a self-storage facility.

Can Jack and an unlikely ally stop a suicide bomber and track the architect of these acts of terror?

Leonard angers the university – and the entire physics community – after he gives an embarrassing interview. Also, Amy and Bernadette bond over having to hide their success from Sheldon…

When Sheldon must teach a class, Howard decides to take it. Amy takes advantage of the tension between Penny and Bernadette.

The concept of what it would mean for women everywhere if Amy were to win a Nobel Prize causes Amy to have a meltdown. Also, Koothrappali and Wolowitz try to…

The girls get involved when Leonard, Sheldon and Raj compete for tenure at the University.

When Sheldon is accused of sexual harassment, he ends up getting Raj, Leonard and Wolowitz in trouble.

With Leonard away, Sheldon and Penny spend quality time together sharing intimate secrets. Also, Wolowitz helps Raj get over his ex-girlfriend.