Welcome back, Carter.

A year and a half after leaving CBS’ Person of Interest, Taraji P. Henson is back in Tuesday’s episode (10 ET/PT). Her NYPD detective, Joss Carter, was shot to death in 2013 — midway through the show’s third season — before she could identify corrupt officials. Now, as the series fights for its own survival, she’s back in flashback form as colleague Reese (Jim Caviezel) tries to solve one of her cold cases.

“Our show has done flashbacks from the very beginning,” says s