Exclusive: Watch WAITRESS' Caitlin Houlahan on Tonight's LAW & ORDER

Waitress star Caitlin Houlahan is appearing on tonight's episode of Law andamp; Order: SVU. In the new episode, Houlahan plays Anne Holmes, a witness to a brutal attack on a man in the street. But when cops come to her door asking for help, she's afraid to let them in. Watch an exclusive video clip, also featuring Mariska Hargitay and Ice T.