Mark Van Gisbergen and Nick Evans earned a London derby draw for Wasps and Harlequins with a magnificent seven kicks apiece in a 29-29 Twickenham thriller.
It was Wasps full-back Van Gisbergen who kept his nerve when presented with a kick to save the game four minutes from time.
Andy Powell, on his debut, and Tom Varndell had crossed for first-half tries for Wasps, while Quins' tries came through Nick Easter and Mike Brown.
Harlequins were first out of the blocks in front of a 75,000 crowd when former New Zealand fly-half Evans eluded a challenge by Simon Shaw and armed support-runner Easter for the game's opening try after only two minutes.
Wales back-row Powell crossed for a try of quality after 23 minutes, finishing off a move also involving Varndell and captain Tom Rees.
Van Gisbergen's conversion hauled Wasps level at 13-13, and they then stormed ahead when Riki Flutey, playing his first game back since spending a season with Brive, broke the line, took the hit while off-loading superbly for Varndell to score his 52nd Premiership try.
Van Gisbergen's sixth successful kick edged Wasps further ahead after 51 minutes at which stage Quins lost patience with their struggling front row and rolled out the changes.
Harlequins then recaptured the lead. As Wasps back-tracked, centres Jordan Turner-Hall and George Lowe combined just inside the Wasps 22, and the finish was delivered wide left by full-back Brown, who evaded two would-be tacklers to score behind the posts. The conversion by Evans moved Quins into the driving-seat with 14 minutes remaining and set up a gripping last act.
Van Gisbergen fired over his seventh goal of the game to haul Wasps level with four minutes to play and secure a dramatic draw.