Countdown Beagle is one of three explosive-expert Beagle Boys. His first appearance was in July 1967, in the Beagle Boys story The Crown Jewel Job by Pete Alvarado.
He has small explosives in his pockets, and if he removes his hat, another can be seen on his head. His prison number is 7654321.
- The Crown Jewel Job (1967)
- The Fountain of Strength (1968)