David Kallaway

A former foe helps Mary keep Salem in the witches' hands.

An investigation leads Angel to an underground gladiator-like arena where he is captured then forced to fight to the death with other demons in order to win his freedom.

Gordon and Bullock investigate a location where several kids have been kidnapped. Barbara proves to be an unlikely ally to Gordon. Meanwhile, Bruce looks into an alleged witch with healing powers for Selina, and Nygma deals with demons of his own.

After Pride travels to a deep sea oil rig for a murder investigation, the team uncovers a gas leak that's on the verge of causing a catastrophic explosion. Also, Sebastian starts his NCIS special agent training at FLETEC.

Jamie and Joe search for an undocumented teenage girl who has been sex-trafficked; a woman in witness protection is murdered; Frank calls out the district attorney's office for instituting a new rule that classifies armed robbery as a misdemeanor.

A teenager rescued from a dangerous situation begs Benson to help reunite her with her father. Carisi and CJ take the foster care system to task for separating families without sufficient proof.