Amelia Workman

Holmes and Watson race to help Detective Bell when he becomes a victim of a bio-terrorism attack at the precinct and the station is quarantined. During the lockdown, Captain Gregson and Detective Bell begin to suspect they are trapped inside with the perpetrator. Also, Watson faces the difficult task of helping her mother, Mary (Freda Foh Shen), accept that her advancing Alzheimer’s disease requires her to receive more medical care.

When a state governor and the co-owner of a skydiving company die during a jump, Bull helps the co-owner's brother, Max Hyland (Frank Whaley), and daughter fight a lawsuit filed by the governor's widow by trying to find who sabotaged the parachute. Also, Bull and his frequent trial collaborator, Liberty Davis (Dena Tyler), find themselves on opposing sides in court for the first time.

When NYPD responds to the scene of an active shooter in a nearby hospital, Shaw is shocked at his connection to the suspect. Maroun and Price face a difficult trial when the defendant offers up an insanity plea.

Secretary of State McCord reluctantly agrees to host a holiday party in the hopes of persuading senators in attendance to pass a treaty that requires countries to destroy landmines. Also, Henry tries to find evidence that the Senate Majority Leader exchanged information with the Russians.