Cameron never sleeps, what she does at night is clomp off to visit a records office. There she learns that a T-888 terminator was sent back to the wrong time. The T-888 arrived in 1920 causing a speakeasy fire and killing a man important to history. So the T-888 named itself Myron Stark and had to recreate the dead man's work itself. Meanwhile John who is dismissed by his peers as a weirdo high school drop out continues his messed up relationship with Riley.
Cameron learns that Myron Stark has been hiding in the walls of a building for decades in order to kill one man. So she terminates Myron Stark. Meanwhile she had made a friend at the records office who noticed her occasional battered appearance, but she alienates him.
This ep was free of Derek, Weaver, Ellison, Jesse, Cromartie and Sarah was only in one scene and because of their absence this ep all the better. Riley is still an annoying superfluous character though. This was okay, John's behaviour is starting to verge on the sociopathic though.