The Hitchhiker (1983)

S1E22 The Curse

Jerry Maclachlan owns a dilapidated apartment complex and assures Serita, one of his tenants, that he will fix the building. However, after meeting an unusual woman named Tanya, he notices a snake tattoo mysteriously appearing on his skin. Both Serita and Tanya offer him advice on how to eliminate the snake. In a shocking twist, Jerry comes to the realization that Serita and Tanya are actually the same individual.