Serial killer up to old tricks in 'Dexter' teaser By (0) Michael C. Hall can now be seen in a teaser for the revival of "Dexter." File Photo by Jim Ruymen/UPI | License Photo Michael C. Hall attends the CBS party during the Television Critics Association summer press tour in Beverly Hills in 2011. File Photo by Phil McCarten/UPI | License Photo Michael C. Hall arrives at the 17th annual Screen Actors Guild Awards in Los Angeles in 2011. File Photo by Phil McCarten/UPI | License Photo April 30 (UPI) -- Showtime has released a 30-second teaser for the revival of its serial-killer drama,