Thursday's TV highlights: 'Portlandia' on IFC

Superstore When Jeff (Michael Bunin) leaves Cloud 9 to work at Target, Garrett (Colton Dunn) convinces Glenn (Mark McKinney) that he’s poaching other employees to go with him. Amy (America Ferrera) goes on a double date with Dina (Lauren Ash). Ben Feldman also stars. 8 p.m. NBC

Grey’s Anatomy...