ER Vet Maura Tierney To Guest Star on THE OFFICE September 27, 2011 News, The Office Actress Maura Tierney, a long-time veteran of ER will make a guest appearance on THE OFFICE, stepping back into comedy after a lengthy absence in that genre (her last appearance was in 1999 in the sitcom NewsRadio). According to the folks over at Zap2It, she will appear as the wife of Robert California (actor James Spader). Currently she is signed for just one episode that will likely air in late November or early December. Since her time on ER, she starred in the short-lived series The Whole Truth and appeared in the final season of Rescue Me. Her film roles include Baby Mama, Semi-Pro and Liar Liar. The Office is currently in its 8th season with the next new episode to air on NBC this Thursday, September 29 at 9/8c. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Google+ (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Pocket (Opens in new window)