While the cast of Showtime's new series Penny Dreadful is still coming together, the network aired a brief trailer last night, during the series finale of Dexter. While we don't see much footage, the video does tease some of the various monsters that will be featured in this series, created by John Logan and executive produced by Sam Mendes. Take a look at the upcoming series debuting in 2014, which stars Josh Hartnett, Timothy Dalton, Eva Green, Reeve Carney, Rory Kinnear, Harry Treadaway, Billie Piper, Helen McCrory, Danny Sapani and Simon Russell Beale. Showtime hasn't revealed when the Pilot episode will premiere yet, so stay tuned for that announcement.