TV Mercy Mercy 5.8/10 by 27 users Mercy is a medical drama which aired on NBC from September 23, 2009 to May 12, 2010. The series initially aired on Wednesday nights at 8/7c, as part of the 2009 fall season, but was pushed back to 9/8c in April. On October 23, 2009, Mercy was picked up for a full twenty-two-episode first season. On May 14, 2010, NBC announced that Mercy had been cancelled and would not return for a second season due to low ratings. Details Casts Posters Images Title Mercy Alternative Titles First Air Date 2009-09-23 Last Air Date 2010-05-12 Number of Episodes 22 Number of Seasons 1 Genres Drama, Networks NBC, Casts Taylor Schilling, Michelle Trachtenberg, Jaime Lee Kirchner, Guillermo Díaz, James Le Gros, James Tupper, Diego Klattenhoff, Charlie Semine, James Van Der Beek, Joey Naber, K.K. Moggie Plot Keywords , Veronica Callahan Taylor Schilling Chloe Payne Michelle Trachtenberg Sonia Jimenez Jaime Lee Kirchner Angel Garcia Guillermo Díaz Dan Harris James Le Gros Chris Sands James Tupper Mike Callahan Diego Klattenhoff Nick Valentino Charlie Semine Dr. Joe Briggs James Van Der Beek Joey Naber Dr. Gillian Jelani K.K. Moggie Tim Flanagan Patch Darragh