Maggie and OA lead the search for an abducted former biological weapons chemist.

The winter continues, and the team at Nonnatus House welcome their newest midwife, Lucille Anderson. Nurse Crane and Dr Turner care for an elderly cancer patient facing eviction.

As Liz and the Task Force race to stop an imminent bombing by an elusive Blacklister, Red has an encounter that will change the trajectory of his life forever.

Sekou buckles under peer pressure to prove he’s not an FBI informant. Saul secretly seeks a second opinion. Quinn tails Carrie’s suspicious neighbor.