Lesser Evils

Sherlock tries to determine who has been killing weak and terminal patients at a hospital, making it look like they died of natural causes. Meanwhile, Sherlock learns more about Joan’s decision to walk away from her surgical career.

An Innocent Man

Oliver still hasn’t figured out how to get back in Laurel’s good graces, but a late night bonding session with Thea gives him the inspiration he needs. Looking into a suspicious murder case, Oliver realizes an innocent man, Peter Declan, was framed by one of the targets on his list. As Arrow, he asks Laurel to help prove Declan’s innocence. Meanwhile, Walter asks one of his employees, Felicity Smoak, to look into a $2.6 million withdrawal that Moira made without his knowledge.