STUMPTOWN - "Dex, Drugs and Rock & Roll" - When Dex's ex Fiona, a famous musician, comes into town for a performance, Dex must protect her from a stalker. Meanwhile, Grey continues to receive the cold shoulder from Dex, and Tookie and Lieutenant Cosgrove develop a new friendship on "Stumptown," WEDNESDAY, NOV. 6 (10:00-11:00 p.m. EST), on ABC. (ABC/Tony Rivetti) IOANNA GIKA