In the "Top Gear" end credits, the Stig is credited alongside Clarkson, Richard Hammond, and James May as a presenter. The Stig's primary role on the show is at the "Top Gear" test track at the show's base at Dunsfold Aerodrome, Surrey. His two main functions are to post lap times for featured performance cars in the "Power Laps" segment, and to train celebrity guests to set lap times in the "Star in a Reasonably Priced Car" segment, although Chris Harris later took on the instructional role.