Mark of the Vampire (also known as Vampires of Prague) is a 1935 horror film, starring Lionel Barrymore, Elizabeth Allan, Bela Lugosi, Lionel Atwill, and Jean Hersholt and directed by Tod Browning. It is a talkie remake of Browning's 1927 silent London After Midnight with the characters' names and some circumstances changed.

Mark of the Vampire was originally 75 minutes, but was cut back to 60 minutes by MGM. Reportedly this was due to incestuous overtones - then unacceptable by the standards of the Production Code - between Count Mora (played by Lugosi) and his daughter. However, the audio commentary on the DVD makes no mention of incest but suggests that much of what was cut was comic material, particularly surrounding the maid.

Sir Karell Borotyn appears to have been killed by Count Mora, a vampire believed to haunt the local village. Now his daughter Irena is the count's next target. Enter Professor Zelen, an expert on vampires who's sent in to prevent her death. At the same time, secrets are revealed surrounding the circumstances of Sir Karell's death. Written by Daniel Bubbeo

Sir Karell has been murdered, and the tiny pinpoint wounds on his neck suggest that a vampire did it. Baron Otto and Dr. Doskil are convinced of it, while the police inspector from Prague refuses to believe. Prof. Zelin, who specializes in the occult, must convince him that a dead count and his wife walk among the living and threaten both Karell's daughter and her fiancé, along with everyone else in the frightened village. At least that's how it all seems ... Written by J. Spurlin