SUBURGATORY - "Stray Dogs" - The bitingly iconic single-camera comedy, "Suburgatory," concludes the season with a one-hour finale event, WEDNESDAY, APRIL 17 (8:00-9:00 p.m., ET) on the ABC Television Network. In the second part, "Stray Dogs," Sheila launches a chastity campaign in Chatswin and convinces Mr. Wolfe to throw a Chastity Ball at the high school, assuming that Lisa will be crowned queen of the ball. Meanwhile George buys a house for Dallas and receives a visit from her ex-husband, and Tessa sets up residence in her bathroom stall at school. (ABC/Carin Baer) DYANA LIU, JAY MOHR, CHERYL HINES, CARLY CHAIKIN (OBSCURED), JEREMY SISTO