Serial killer up to old tricks in 'Dexter' teaser UPI News Service, 04/30/2021 Showtime has released a 30-second teaser for the revival of its serial-killer drama, Dexter. ADVERTISEMENT The preview, which has gotten nearly 1 million views since it was posted online Thursday, opens with a snowy outdoor scene with a campfire. Reflected in the window of a cabin can be seen a person tied up and struggling. Michael C. Hall -- the titular blood-spatter expert and vigilante -- then turns to the camera and grins as the song, "Don't Let Me Be Misunderstood," plays in the background. Dexter is set to return as a 10-episode, limited series this fall.