After "Dynasty" was cancelled in 1989, Beacham landed the lead role in the children's fantasy film "The Wolves of Willoughby Chase", playing an evil governess. She was then cast in the US sitcom "Sister Kate", taking the lead role as a nun taking care of children in an orphanage. The series lasted for one season and was cancelled in 1990, though she earned a Golden Globe nomination for the role. She then returned to Britain to play Mrs. Peacock in an ITV game show version of the board game "Cluedo" (1990). Reuniting with "Dynasty" producer Aaron Spelling, Beacham also had a recurring guest role in the popular teen drama "Beverly Hills, 90210", playing Iris McKay, the estranged mother of Luke Perry's character Dylan. Beacham appeared in six different television series produced by Spelling, including "Dynasty" and its spin-off, "The Colbys", "The Love Boat", "Beverly Hills, 90210", "Burke's Law," and "Charmed". In 1993, Beacham signed on to play Dr. Kristin Westphalen in the NBC science fiction series "seaQuest DSV", produced by Steven Spielberg. Her character was the chief oceanographer and medical doctor for the submarine "seaQuest", however Beacham left the programme after its first season. Throughout the 1990s, she continued to make guest appearances on television programmes, working in both the UK and the US. In 1996, she starred in the BBC drama "No Bananas" which was set during the war years.