Katie Fountain

The BAU searches for an UnSub who is purposely disfiguring victims. Also, Rossi has an awkward reunion with his ex-wife, Hayden Montgomery, who kept his daughter, Joy, a secret from him for nearly 30 years.

While on spring break vacation in Mexico, Chip Rosatti, the son of a prominent San Francisco businessman, wins a free skydiving jump. Watching from the ground, two of his friends gaze up in horror as Chip leaps from the plane but fails to open his chute and plummets to his death. When Chip's body is examined at the morgue, local coroner Dr. Madero discovers some perplexing news: Chip Rosatti didn't die from hitting the ground -- rather, he drowned in mid-air. A call from the Mayor of San Francisco sends Monk to the Mexican vacation spot in order to figure out just what happened during that fall.

The squad investigates the murder of two drug dealers, and the discovery of a body mistakenly listed as a victim of the World Trade Center attack. McDowell arrests the daughter she gave up for adoption.

Brian "Smash" Williams (Gaius Charles) is determined to get a football scholarship to college despite the recent events that have transpired. However, Brian is very shocked when the most unlikely place offers him what may be the opportunity of his life. Tami Taylor (Connie Britton) runs into her ex-boyfriend from high school, a big real estate mogul, and he decides to stay in Dillon for a few days. A few days proves to be too long as Coach Taylor (Kyle Chandler) begins to feel a bit jealous. Elsewhere, Jason Street (Scott Porter) hears the biggest news of his life since his accident and must decide if he is willing to change his life completely. Meanwhile, Tim Riggins (Taylor Kitsch) continues his pursuit of Lyla (Minka Kelly) by getting his own radio show at the Christian radio station. Lyla seems to be enjoying her current relationship with her Christian boyfriend as she goes with him to meet his family. Jesse Plemons, Adrianne Palicki, Aimee Teegarden and Zach Gilford also star.

Flex must persuade Cheryl to seek help for her alcoholism after she physically abuses Arnaz. Guest star: Kim Fields.