Cassie Beck

Sherlock's father, Morland (John Noble), becomes Sherlock and Joan's prime suspect in a murder investigation after one of his employees is killed under the guise of a robbery.

Dr. Rhodes (Colin Donnell) fights to save a mother who's desperate to help her daughter beat cancer. Dr. Charles (Oliver Platt) asks Sarah (Rachel DiPillo) to conduct his daughter Robin's (Mekia Cox) psych evaluation but has difficulty staying out of the case. When Will (Nick Gehlfuss) and Dr. Manning (Torrey DeVitto) spend more time together at work, Nina (guest star Patti Murin) goes to extreme measures to get Will's attention. Meanwhile, Dr. Choi (Brian Tee) puts pressure on Noah (guest star Roland Buck III) when a residency spot becomes available. S.Epatha Merkerson, Marlyne Barrett and Yaya DaCosta also star. Jesse Lee Soffer also guest stars.

Season Three Finale. An acting teacher named Leonard contemplates a move back to New York. The Guy connects with old high-school friends, Sarah and Brian, who are visiting the city under difficult circumstances.

As the friend group gathers at the start of quarantine for their new-normal virtual hang, Annie contemplates opening up to Ben about her feelings for him. Meanwhile, everyone worries about Jazmin, who's been MIA.