: 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, leading to a divorce. However, they discover April is pregnant shortly before signing the papers. Greys Anatomy - Season 12
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. : Jason George (Ben Warren) was promoted to a series regular
: Tension peaks when Callie’s new girlfriend, Penny, is revealed to be one of the doctors who failed to save Derek. Penny eventually joins the hospital as a resident, causing friction with Meredith and Amelia. Relationship Turmoil : However, they discover April is pregnant shortly before
: This season marked the final regular appearance of Sara Ramirez as Callie Torres. Reception & Ratings