An orphan boy has information that incriminates a 1960s cult figure who is trying to make a comeback.

An invisible man gets into Star Labs, and releases a neurotoxin with Tina inside the lab. Then he starts killing scientists who worked on the project. Flash must find the invisible man and save his friend.

Captain Cold, who freezes his victims to death, is contracted to kill the Flash.

An android built by the government to use an assassin refuses to obey her orders. She escapes, and is befriended by Tina and Barry.