"The Two Escobars" is my favorite 30 for 30 right next to "June 17th 1994" which is a brilliant chronological telling of all of the events happening on that day: Arnold Palmer's last US Open, opening day of the USA-hosted World Cup, Rangers celebrating winning the Stanley Cup, Game 5 of the Knicks vs Rockets NBA Finals, Griffey Jr tying the HR record, and OJ's white Bronco car chase. If you can only watch one, that might be the best choice.