Glee creator Ryan Murphy has invited the show's original cast to return for the upcoming 100th episode. The writer/director reached out to fans of the show via Twitter.com on Tuesday (03Dec13) and alerted them to the fact he had called the stars from the first season of the series back to the fictional McKinley High. He wrote, "ALL The Glee Originals received invites today to be in our 100th episode! More to follow." That means Dancing With the Stars winner Amber Riley, Mark Salling, Dianna Agron, Harry Shum Jr. and new mother Heather Morris could all be back for the special show, which is set to air in March (14).