02E12 - The Man in the Cell

When Booth takes Bones to jail for the identification of a corpse badly damaged in a prison fire, she and Zach find it's a fireman's, made to resemble that of the cell's inmate, serial murderer Howard Epps (see episodes The Man on Death Row and The Blonde in the Game). Howard has escaped, calls the Jeffersonian and makes good on his threats, giving word pun-clues but keeping ahead and getting to various members of the team or their loved ones, such as leaving a victim's severed head in a fridge with a hidden explosive charge releasing a mysterious, potentially fatal poison during the autopsy or proving he can approach Booth's kid son Parker at the playground, the best way to terrify a devoted heroic father. Booth tries to put the pressure on Howard by arresting his disgusting fat, abusive mother Marianne Epps, with whom he has a mutually sick relationship, but the cruelly clever chain of dangers continues, right to the last surprise act...