Plot: Disneyland began its 4th season on the air with a gala, all-star ""special"", essentially designed to promote all 3 of Disney's network TV series. Pressured by his cartoon creations and the latest crop of Mouseketeers to tell them what's in store for the 1957-58 season, host Walt Disney offers tantalizing glimpses of the new weekly adventure show Zorro, the Disneyland miniseries The Saga of Andy Burnett (with Jerome Courtland in the title role) and the newest installments of such Mickey Mouse Club serials as ""Spin and Marty