: The couple's marriage collapses, leading to a divorce. However, they discover April is pregnant shortly before signing the papers.
Season 12 of Grey's Anatomy , which premiered on September 24, 2015, is often described as the "season of rebirth". Following the death of Derek Shepherd in Season 11, the show shifted to a noticeably lighter, more "rom-com" tone, reminiscent of its earliest seasons. Greys Anatomy - Season 12
: Miranda Bailey successfully campaigns to become the hospital’s first female Chief of Surgery . : The couple's marriage collapses, leading to a divorce
: Jason George (Ben Warren) was promoted to a series regular. Giacomo Gianniotti (Andrew DeLuca) also became a regular mid-season. : The couple's marriage collapses