Season: 112015

The 2015 television landscape featured several major long-running series hitting their landmark . While many shows reached this milestone during the 2015 calendar year, they often fell into different halves of their respective broadcast cycles. The Year of the Darkness: Supernatural

The finale saw an unprecedented alliance between the Winchesters, Castiel (possessed by Lucifer), Crowley, Rowena, and God to stop the Darkness. The Meredith-Centric Era: Grey's Anatomy Season 112015

Supernatural premiered its 11th season on The CW on October 7, 2015. A fan-favorite episode filmed entirely from the perspective

The season featured the significant return of Lucifer (initially portrayed by Mark Pellegrino in the cage) and ultimately revealed Chuck as God. Castiel (possessed by Lucifer)

Grey's Anatomy began the second half of Season 11 in January 2015 and concluded it in May.

A fan-favorite episode filmed entirely from the perspective of the Winchesters' 1967 Chevrolet Impala.

The season centered on The Darkness (Amara), an all-powerful entity predating creation that was unleashed after the Mark of Cain was removed. Key Highlights: