Lots of season finales are on the horizon, but one of the week’s biggest TV events is the debut of Showtime’s monster series “Penny Dreadful” Sunday night at 10. The dark drama stars Timothy Dalton as a London nobleman who recruits various characters to help him find his daughter, who has been taken by a gang of vampires. Dalton’s crew includes the mysterious Vanessa Ives (Eva Green), Dr. Victor Frankenstein (Harry Treadaway), an American Buffalo Bill type (Josh Hartnett), Dorian Gray (Reeve Carney) and others. There’s even a Jack the Ripper element, in case the gore of vampire murders and reanimated dead aren’t enough for you. The performances and effects are stunning, but the story – at least in the first two episodes – is a little too grim. A bit of levity would be much appreciated down the line.