The "UFOs" ended up being a satellite that was flying too low in orbit. (The trip to The Edge of the World was about 3,528 miles from their attic) Compilation releases Other than the eleven episodes, there were two compilation videos made. The Amazing Adventures of Mary-Kate & Ashley Includes The Case of the SeaWorld Adventure, The Case of the U.S. Space Camp Mission, and The Case of the Hotel Who-Done-It. The Favorite Adventures of Mary-Kate & Ashley Includes The Case of the Volcano Mystery, The Case of the Fun House Mystery, and The Case of the Logical I Ranch. Mary-Kate and Ashley's Christmas Collection Includes You're Invited to Mary-Kate and Ashley's Christmas Party, The Case of the Christmas Caper, and The Case of the Mystery Cruise. References Direct-to-video film series American children's films 1990s mystery films 1990s musical films Mary-Kate and Ashley Olsen Films about children Films about twin sisters 1990s children's films Twins in fiction 1990s American films