hour and titled Most Haunted Unseen. Added footage in these episodes is shown with a caption in the corner to distinguish it from the original version. The series concluded with an investigation of Michelham Priory on 17 September 2002, which was coincidentally the first episode to be produced. In the eighth series the team revisited this location to mark the 100th episode. During the break in series, the team aired three live investigations, the third of which led into the second series on 8 April 2003. From this point onwards episodes were accompanied by a supplemental Most Haunted Extra. At this point, Extra was available as a ten-minute feature after the main show, accessible to viewers via the red button. For Series two and three, Phil Whyman joined the show as a paranormal investigator, replacing the original investigator Jason Karl, as well as guest investigators David Scanlan and Vicki Purewal, who left at the end of the first series. The show remained unchanged at this point until Series 4. Series 4–6 (Derek Acorah departure and revamp) The fourth series commenced on 23 March 2004 with an investigation of Owlpen Manor. Most Haunted Extra became a 30-minute programme, broadcast for half an hour after the main show on LivingTV. This series was the first series in which guest mediums joined the team during the investigations. This took some of the pressure off Derek Acorah who had been the only medium in the first three series. The main guest mediums involved during this series were Salisbury native Brian Shepherd, David Wells and Scunthorpe's Ian Lawman. Series five commenced on 14 September 2004. It was preceded by a 3 night Most Haunted Live! investigation advertised as a countdown to the series. Phil Whyman was replaced with (although he recently returned on the Live shows as a studio expert), then semi-regular, Ciarán O'Keeffe. Originally O'Keeffe viewed the footage recorded during the investigations and analysed it, putting forward his own views and opinions, which usually included suggestions as to other possible causes for the phenomena encountered. He shared this role with his colleague Matthew Smith who frequently attended the early Most Haunted Live events. Following the departure of Phil Whyman after Series 4, O'Keeffe began to join the team on location. Yvette's brother Rick Fielding also left the show at the end of Series 4. At the end of Series 5, Antix Productions began editing