From Wikipedia, the free encyclopedia Megan Ketch is an American actress. Ketch graduated New York University and in March, 2012 was cast in lead role of ABC drama pilot Gotham. Later in 2012 she replaced Jennifer Esposito in CBS series Blue Bloods as detective Kate Lansing. Her other television credits include A Gifted Man, Law & Order: Special Victims Unit and The Good Wife. She made her feature film debut in 2013 comedy The Big Wedding.