The first showing of the pilot occurred on July 27, 2007 at Comic-Con International in San Diego. It received mostly positive responses from critics and audience members alike. The series premiered on The CW on September 25, 2007, and ran on Tuesdays, but moved in late February 2008 to Thursdays after "Smallville". After the restart following the writers' strike, "Reaper" returned to being broadcast on Tuesday nights on The CW as original releases.