Creepy US drama Dexter has helped FX to its best-ever audience numbers.

On Sunday night, the Showtime original thriller starring Michael C. Hall as a crime-solving serial killer averaged a 3.6% share in pay TV and a 2.2% share in multichannel. Over 300,000 viewers tuned in to watch the show, besting the channel's previous record of 273,000 for NCIS.

Jason Thorp, senior VP and deputy managing director of Fox International Channels UK said: "We always had faith in Dexter, the quality of the show stands for itself, but it is great to see all the work reap its rewards, particularly when the campaign in question is a key stepping stone in driving the channel forward as the choice destination for quality entertainment."