Stephen Wallem is an American stage and television actor. He is best known for his one-man musical revue, "Off the Wallem", as well as numerous theater productions. Wallem is also a playwright, composer, and director. From 2009 to 2015, he portrayed Thor Lundgren in the Showtime series Nurse Jackie. He is the younger brother of Linda Wallem, who is an actress, a writer, and a producer.