The New Adventures of Robin Hood (1997) : 4x5

Robin and Marion go to a charity event hosted by Queen Eleanor and the Amazons. An exiled Amazon called Black Rose arrives uninvited and kills the Amazons' leader. Rose threatens to kill Eleanor as well unless she proclaims Rose the Queen of the Amazons. Rose then disappears, so Robin searches for her while Marion protects Eleanor. Meanwhile, Little John and Andy find Barkley's laboratory empty except for a sketch of a device and a mysterious note: Rose has stolen Barkley's new explosive invention in order to assassinate Eleanor. She then captures Robin, who has to be rescued by Little John and Andy. Together, they all help Marion protect the Queen and put an end to Rose's plans.