Joe Locke chats with ET's Cassie DiLaura at the Los Angeles premiere of 'Agatha All Along,' streaming Sept. 18 on Disney+. The actor talks about the upcoming season 3 of his Netflix series, 'Heartstopper,' and teases what fans can expect. Joe also opens up about starring in 'Agatha All Along,' and why the series is the perfect spinoff from 'WandaVision.'