Buck played Det. G. Lynn Bishop in Law & Order: Criminal Intent, temporarily replacing Det. Alexandra Eames (played by Kathryn Erbe) while the latter was on maternity leave. Buck's television roles have not been limited to only drama; she also played a character on the comedy series Stella. She recently wrapped her directorial debut, 21 BELOW, a documentary that takes an in-depth look at a family from Buffalo, NY. It reveals their economic, social, interpersonal struggles, and their fight to stay together while their world around them pulls them apart.