Danny is forced to ask his incarcerated arch enemy for help when a convict escapes from prison; Frank tries to talk Jamie to take the sergeant's exam; Erin's plan to go on a date with her ex-husband creates friction between her and Anthony.
Danny resorts to asking his incarcerated arch enemy for help locating a dangerous criminal who escaped from prison; Lugo refuses to assist unless he's allowed to accompany them on the pursuit; Frank tries to convince Jamie to take the sergeant's test.