When the Gun Goes Bang, Bang, Bang

S1 E10: In the season finale, after an undercover cop working a narcotics-smuggling sting is shot dead, the killers turn their sites on Boston homicide headquarters, leaving Jane, Maura and Frankie Jr. trapped in a fight for survival on their home turf. It's a situation that will force Maura to challenge herself like never before. Recurring guest star CHAZZ PALMINTERI and guest star ERIK PALLADINO (ER) appear.