This series was introduced by several hosts. The West coast (Hollywood) was hosted by the series star, Boris Karloff. The East coast (New York) was hosted by an anonymous voice known as "Dr. X" which some attribute to multiple talents. Other stars occasionally appeared, including Peter Lorre, Bela Lugosi, Raymond Massey, and Basil Rathbone. But it was Karloff who regular listeners expected to hear as host to the proceedings. It was about the only part of the show that was predictable. . The print ads for this series certainly go all out on the hyperbole. One reads: "WARNING! Persons suffering from heart trouble and those whose blood has a tendency to curdle and hair to uncurl under the stress of great excitement are urged NOT to listen... The station disclaims all responsibility for the health of those who insist on hearing this thriller." Well, at least you can't say you weren't warned! Creeps By Night promised all this and more. They told listeners to expect Karloff each week, along with other well-known Hollywood stars. They also promised new, original stories that were going to be written by the leading writers in the industry. However, the new Blue Network didn't' advertise properly and started failing to deliver on its goals. Neither the upcoming stories nor the upcoming stars were advertised in advance. To make matters worse, the writers didn't receive any on-air credit, either. Karloff stopped hosting after the 12th episode, and the unknown "Dr. X" hosted the final four episodes (voiced by at least two different people). It all unraveled from there. Yet the surviving episodes are quite solid and make fans regret the loss of such a promising series.