EDWARDS back, rodrick arcs, johnson guests

Anthony Edwards is returning to "ER" for one episode in the long-running NBC drama's final season. He will reprise his role as Dr. Mark Greene in the episode titled "Heal Thyself," set to air Nov. 13. The episode will show Greene in a series of newly shot scenes featuring characters from the show's past while also giving insight into Dr. Banfield's (Angela Bassett) past and her experiences within the walls of County General. … Michael Rodrick has been cast in a multiepisode arc on Fox's "24," playing Stokes, a deadly military operative. Rodrick, who also will guest star on CBS' "Without a Trace" in the fall, is repped by GVA Talent and Judy O Prods. … Gymnast and Olympic gold medalist Shawn Johnson will guest-star as herself on Tuesday's episode of ABC Family's "The Secret Life of the American Teenager." This week's episode of "Teenager" averaged 2.4 million viewers in the 12-34 demo, including 1.9 million females. That made it TV's No. 1 program at 8-9 p.m. Tuesday in the demos.