Meredith Grey (Ellen Pompeo) makes out with Owen's sister's ex husband Nathan Riggs (Martin Henderson) on Grey's Anatomy season 12, episode 23 (At Last).
Promo for the fifth season of Grey's Anatomy broadcasted on ABC. Although, the clips shown are from the fourth season. Anyways, can't wait for season 5 to start!! :) Please rate and comment. Enjoy!