Grey’s Anatomy will air episode 13 of season 15, which is titled I Walk the Line on Valentine’s Day (Thursday, February 14) at 8pm EST/7pm CST on ABC (Grey’s Anatomy airs on Sky Witness in the UK). ABC will release a promo for the episode straight after tonight’s (Thursday, February 7) episode airs. Grey’s Anatomy fans can read on to find out what the trailer will reveal about what will happen in I Walk the Line on ABC and Sky Witness. Related articles Grey’s Anatomy season 15 cast: Who is in the cast of Grey's Anatomy? Grey's Anatomy season 15: Is Ellen Pompeo leaving as Dr Meredith Grey? What will happen in Grey’s Anatomy season 15, episode 13? The official ABC synopsis for I Walk the Line by ABC reads: “A sea of patients flood Grey Sloan Memorial after gunfire goes off at a parade. “A blast from the past throws Dr Maggie Pierce (Kelly McCreary) off her game on the same day that Dr Meredith Grey (Ellen Pompeo) tries to talk to her about dating Dr Andrew Deluca (Giacomo Gianniotti). “Meanwhile, Dr Owen Hunt and Dr Amelia Shepherd get some potentially life-altering news about Betty Nelson (Peyton Kennedy).” The trailer for the new episode will air directly after tonight’s episode, Girlfriend in a Coma. HOW TO WATCH GREY'S ANATOMY SEASON 15 ONLINE The Grey's Anatomy season 15 episode 13 promo sees a bagpipe player injured (Image: ABC) However, ABC has released a series of promo images that give us a look at what will happen in season 15, episode 13. A number of the images show a group of bagpipers, all dressed in identical kilts and waistcoats. The promo images make it seem as if one of these pipers is shot in the parade. A man who is presumably the leader of the bagpipe players, played by Lord of the Rings’ Billy Boyd, is seen in the image in a blood-stained shirt watching over a patient. WHO IS IN THE CAST OF GREY'S ANATOMY SEASON 15? Related articles Grey's Anatomy season 16: Will Sandra Oh return to Grey's Anatomy? Grey's Anatomy season 15, episode 12 promo: What will happen next? Grey's Anatomy season 15 episode 13 is titled I Walk the Line (Image: ABC) In another image, he is seen with his hand on the forehead of the young gunshot wound victim. Another image shows the troupe squaring off against Dr Alex Karev (Justin Chambers), suggesting they may bring bad news as well as bagpipes. ABC has also revealed that the episode will feature a major guest star in the form of Dirty Dancing’s Jennifer Grey. We do not know much about her character, save from the fact she is called Carol Dickinson. HOW MANY EPISODES IN GREY'S ANATOMY SEASON 15? The Grey's Anatomy season 15 episode 13 trailer will air after Thursday's episode (Image: ABC) However, fans are speculating she is either a figure from Maggie’s past or a woman tied to Betty in some way. As suits an episode which comes out on Valentine’s Day, love will be in the air at Grey Sloan. The synopsis seems to suggest that Meredith has chosen DeLuca over Link (Chris Camack). However, we will know more when ABC release the latest promo from Grey’s Anatomy. Grey’s Anatomy season 15 airs Thursdays at 8pm on ABC This article contains affiliate links, which means we may receive a commission on any sales of products or services we write about. This article was written completely independently, see more details here.All rights reserved for this news site express.co.uk and under his responsibility