A series of murders in San Francisco bearing the tell-tale signs of the infamous Zodiac Killer have the BAU wondering if the notorious serial killer has returned. Also, Reid ponders if he should be doing more with his genius abilities.

Catherine's friend Laura's mogul husband Mark has a lot to hide behind his successful international corporation, and he's hired a crack team of assassins to carry out the murders of anyone who might be aware of what he's doing, and that includes Laura's lawyer and Laura herself.

The Aquarium of the Pacific in Long Beach is visited ahead of a challenge in which the contestants must make waterproof creature makeup.

Dave welcomes actress Marg Helgenberger from the CBS drama series "CSI: Crime Scene Investigation," actor Michael Fassbender, and musical guest Ellie Goulding.

Benson and Amaro must work around a resistant victim when the CEO of a military contractor is assaulted.

Claire prepares for her debate with Duane Bailey. Mitch and Cam try to clean up Lily’s language before her turn as a flower girl. Jay blames Stella’s strange behavior on Gloria.

Daniel's romantic proposal may come with dire ramifications; Charlotte is forced to move back in with her mother; Jack's life is in jeopardy when a person he adores betrays him; Nolan makes Emily think cautiously about her actions.

Hank blames Dr. Van Dyke for a prescription error; the HankMed team attends a divorce party.

Mitt Romney faces questions about his tax rate, Stephen announces his South Carolina rally, and David Frum shares his hopes for the Republican Party.

Episode info coming soon ..

With Indiana hosting the Super Bowl, Frankie is devastated when she hopes to land a plum assignment as an official volunteer and ends up with a less-than-stellar position. Meanwhile, the entire Heck household takes advantage of the Donahue's new car while they are out of town, and a scary, close call with the car causes Sue to profess her true feelings to her new boyfriend, Matt.

The chefs try not to go off the rails when they use various ingredients delivered to them by a train. Later, they create a gothic dish fit for a queen, yet the plate must embody the very essence of evil. Guest judge: Charlize Theron.

Episode info coming soon ..