M ickey Fitzpatrick is not like other cops. In fact, she seems to have little in common with anyone in her world. Played by Amanda Seyfried , with a disconcerting intensity that echoes her Emmy-winning portrayal of fraudster Elizabeth Holmes in The Dropout , the protagonist of Peacock’s Long Bright River is a bright young woman and a talented English horn player. She was supposed to get out of Kensington, the crime-ridden Philadelphia neighborhood where she grew up, but only lasted a year at