Rock Kohli

After a bomb leaves three people dead, the team presses a reluctant informant to gather information from his close friends who are under suspicion; OA and his girlfriend clash over where the informant's rights lie.

When a well-respected mathematician is found dead, Holmes and Watson set out to solve a murder and the purpose of the highly guarded equation he was trying to decipher. Also, a former patient's son asks Watson for a loan.

Danny resorts to asking his incarcerated archenemy for help locating a dangerous criminal who escaped from prison. Lugo refuses to assist unless he's allowed to accompany them on the pursuit, and Frank tries to convince Jamie to take the sergeant's test.