On Jan. 23, the newest episode of the procedural will feature Maura Tierney ... the-scenes look at the reunion. Tierney joined the cast of ER in 2000 as nurse Abby Lockhart while La Salle ...
Prepare to welcome Maura Tierney to the world of Law ... as she starred as nurse-turned-doctor Abby Lockhart in ten of ER's fifteen seasons for a total of nearly 200 episodes.