ION Mystery

Morgan returns to the BAU to help Penelope deal with a case that has affected her emotionally.

When Russ is kidnapped, Mac and the team must break out a previously murderous psychopath, now pacifist, from prison to help find him; while on the run, Mac and Desi are forced to confront their relationship issues.

Mac's meeting with Desi's parents goes sideways when her brother finds himself in trouble and needing their help; Russ and Matty must ask an old nemesis for assistance when their new recruitment candidate is kidnapped.

Using a cryptic postcard as their only clue, Mac and the team must solve a fallen friend's final case and bring him justice.

During COVID-19's first stay-at-home order, Mac, Bozer and Riley must stop a crime in progress at their neighbor's house; Russ' romantic fling takes on a longer and more complicated turn when they quarantine together.

A secret experimental cancer treatment Mac's developing with a friend is discovered when culprits ransack their lab, kidnap Mac's partner and plan to use the research to create a powerful new nerve agent.

Mac and team rush to help when Matty's former mentor, Ian Cain, and his embassy staff come down with a deadly, mysterious illness; Taylor and Bozer work with Jerry Ortega to infiltrate a Codex cell.

When Mac and the team are unable to prevent sensitive intel from falling into Codex's hands, Mac must scale a vertical cliff using only gear he can cobble together himself to prevent the info's transmission.

While on a mission to hunt down a Codex lead, Mac and the team discover Murdoc hacked their comms and has recorded them for months.

Brennan asks Booth to be the father of her child; Stewie Griffin (Seth MacFarlane) offers the couple advice.

When a body is discovered at a popular nightclub, everyone is a suspect.

Angela's psychic, Avalon Harmonia (Cyndi Lauper), alerts Brennan and Booth to the presence of a mass grave beneath a fountain.

Booth and Brennan investigate when a man is murdered for the undisclosed contents of his briefcase; the team looks for alternate funding for Wendell when he loses his scholarship.

Human remains are found next to a railroad; Cam deals with the stress of being a new parent; Booth tries to keep Cam's stepdaughter in line.

When human remains are found at a neighborhood block party, scandals and suburban politics give many people a motive; Booth's son tries to find a girlfriend for his father.

Brennan and Booth investigate what appear to be charred human remains on an electrical fence; Brennan goes on a date with Booth's supervisor; Sweets' girlfriend returns to the Jeffersonian.

The Jeffersonian team investigates when the mutilated remains of a chicken farmer are found near a river; the case prompts Angela to launch an animal-rights campaign.

Booth must be recertified for FBI marksmanship, but he is not the accurate shot he was before having brain surgery; Brennan and Booth investigate the death of a little person who was a wrestler.