Sliders (1995)

S5E4 The Great Work

The Sliders find themselves on a remote island, accompanied by an ailing Maggie. In their quest for assistance, Rembrandt, Mallory, and Diana encounter the monks of a hidden monastery. Though initially hesitant, the monks permit them to remain and provide medical care for Maggie. However, the Sliders soon discover that the monks are harboring a dark secret and have no intention of letting them depart.