This weekend, all the Harry Potter movies are shown in a three-day chronological burst, simulcast by both Syfy and USA. The first two films in the series are shown tonight. They’ll also be repeated tomorrow morning, in an all-day marathon – but if you want to get a head start and leave tomorrow morning free for some World Cup viewing, you can start tonight. The 2001 film that launched the series, Harry Potter and the Sorcerer’s Stone, begins at 8 p.m. ET on both Syfy and USA. That’s followed at 11:05 p.m. ET by 2002’s Harry Potter and the Chamber of Secrets.