The new trailer for Season 3 of the Netflix drama "Heartstopper" is out. The hit series stars Kit Connor and Joe Locke as best friends-turned-more, along with Corinna Brown, Kizzy Edgell, William Gao and Yasmin Finney; Season 3 will also feature an appearance by "Bridgerton" star Jonathan Bailey. "Heartstopper" Season 3 premieres on Netflix October 3.