Timeless Call won for the fourth time over course and distance as she took the feature Mercury Stakes under the Dundalk lights for the Reggie Roberts yard.
Third in the Listed five-furlong contest last year, the mare (6-1) was always on the front end in the hands of Pat Smullen as she duelled for the lead with Almadaa.
There was plenty of trouble behind her as she hit the front a quarter of a mile out and she kept going to hold British raider Monsieur Joe, who didn't have the best of passages, by three-quarters of a length.
Smullen was completing a double after the success of Seanie, who led home a David Marnane-trained and Damian Lavelle-owned one-two in the Book Your Christmas Party At Dundalk Handicap.
Always prominent, the 12-1 chance hit the front two furlongs out and ran on strongly to resist his stable companion, a 7-2 shot, by half a length. The rest were well beaten.
Eddie Lynam's youngster Caso Do Lago (7-2) broke his maiden on his first sight of Dundalk earlier this month and followed up with an all-the-way success under Niall McCullagh in the www.dundalkstadium.com Nursery, defying a 6lb ratings rise to score by a length and three-quarters.
Fran Berry quickly adopted the rails berth on Salvado in the Floodlit Friday Nights At Dundalk Maiden and Charles O'Brien's 100-30 favourite led all the way to score cosily by a length and a quarter.
Joseph O'Brien racked up winner number 126 of the season when he took full advantage of a gap on the rails to drive his father Aidan's 5-1 shot Waver to victory by two and three-quarter lengths in the Crowne Plaza Race & Stay Handicap.
Conor Hoban grabbed the first division of the Crowne Plaza Leading Jockey & Trainer Championship Apprentice Handicap close home on Reckless Lad (7-1), while 16-year-old Tom Madden kept Happy Anniversary (10-1) going to take the second.