Absolutely Fabulous on Instagram: "Absolutely Fabulous – Series 1, Episode 4 (“Iso Tank”) This episode first aired on 3 December 1992. Plot summary: Patsy and Edina become obsessed with the latest New Age craze: sensory deprivation in an “isolation tank.” Edina has one installed in her home, convinced it will help her achieve relaxation and spiritual enlightenment. Meanwhile, her daughter Saffron, as usual, tries to maintain some normalcy in the house despite her mother’s antics. When Edina clim