Megacast, formerly known as ESPN Full Circle, is a multi-network simulcast of a single sporting event across multiple ESPN networks and services—with each feed providing a different version of the telecast making use of different features, functions or perspectives. Eleven networks and services have been involved with these specials, including ESPN, ESPN2, ESPNEWS, ESPN Classic, ESPNU, ESPN Radio, ESPN Mobile, ESPN3/WatchESPN, ESPN.com, ESPN Brasil, TSN/RDS, ESPN International and ESPN Deportes.
ESPN Full Circle debuted with ESPN Full Circle: North Carolina at Duke on March 4, 2006, on the one-year anniversary of ESPNU. The game was the North Carolina Tar Heels at the Duke Blue Devils in college basketball. A month later the second installment of ESPN Full Circle showed ESPN Full Circle:Bulls-Heat NBA Playoffs on April 22, 2006. The game featured the Miami Heat and the Chicago Bulls. The third edition of ESPN Full Circle showed ESPN Full Circle: Florida State vs. Miami on September 4, 2006. The game featured a college football game between Florida State Seminoles at the Miami Hurricanes. The fourth installment featured the Florida Gators vs. the Auburn Tigers on October 14, 2006 and was entitled ESPN Full Circle: Florida vs. Auburn. The fifth Full Circle broadcast was on March 4, 2007, with the NASCAR Busch Series Telcel-Motorola Mexico 200. The sixth "Full Circle" event was the 2007 NCAA Women's Basketball Championship Game on April 3, 2007. After a seven-year hiatus, full-circle broadcasts resumed under the Megacast branding in 2014.