Ep 4. Keeper

In Criminal Minds season 12 episode 4, titled "Keeper," the BAU investigates a series of murders in San Diego that appear to be linked to a possible cult. The team is called to the scene when a young woman is found murdered, and soon discovers that she was part of a group that was heavily influenced by a charismatic leader.

As they dig deeper, the agents begin to uncover a web of secrets and lies that suggests the cult may be responsible for a number of gruesome deaths in the area. They find themselves playing a deadly game of cat and mouse with the cult's leader, who is determined to protect his followers at any cost.

Meanwhile, Reid continues to struggle with the emotional aftermath of his time in prison, and his teammates try to support him as he grapples with his feelings of guilt and shame.

Throughout the episode, the team must race against time to catch the killer before he strikes again, and unravel the tangled web of connections between the cult leader and his followers. With tensions running high and the clock ticking down, the agents must use all of their skills and experience to stop the cult and bring the killer to justice.

"Keeper" is a tense and suspenseful episode of Criminal Minds, filled with unexpected twists and turns that keep viewers on the edge of their seats. As always, the BAU team is at the top of their game, using their expertise and intuition to solve the case and save lives.