Four British teens on vacation visit an island and discover that a terrorist group is using it as their headquarters.
as Bill Smugs
as Uncle Jocelyn
as Aunt Polly
as Alison Mannering
as Smith
as Jo
as M.I.5 Boss
as Map Shop Owner
as Mr. Roy
as Maggie
as Mr. Roy
as Philip Mannering
as Dinah Mannering
as Jack Trent
as Lucy-Ann Trent
