Hired by Fiona's boyfriend's friend Henry, Michael poses as a disgruntled bodyguard to thwart a kidnapping plot masterminded by a ruthless man named Lesher.

In the fourth season finale, Allison tries to help a young couple who thinks their house is haunted, but her efforts result in murder. Meanwhile, Meghan Doyle tries to sell her controlling interest in Joe's invention and Joe tries to save his own stake in it. An unexpected situation occurs between Devalos and Tom Van Dyke and the outcome effects the election for district attorney.

The BAU faces one of its toughest cases when the team is called to New York City to determine if a series of random shootings is the work of one serial killer or a team of killers working together.

Jace, a blackmailer, with Tempus' diary, finds out about Clark's identity and forces him to steal and do everything more that he wants...and one thing more (by Nigel's suggestion)....to kill Lois, or he kills Martha and Jonathan. Lois tells Clark the only way to save his parents is to freeze her, then she will look like a dead person, and he tells her this can be very dangerous to her life, but, even so, she tells him to freeze her. Superman gives Lois (appearly dead) to Jace and Nigel, then they lock Superman in the same place where his parents ...