Colonel Kyle 'Ace' Morgan was a skilled pilot in the United States Air Force. He flew jets in various conflicts but has now left the service. Ace was En route to appear on the radio program but was involved in a plane crash but miraculously survives along with three other men. The other men consisted of Olympic westling champion Lester "Rocky" Davis, master skin diver Walter "Prof" Haley, circus daredevil Matthew "Red" Ryan. The four survivors decided that they were now all living 'on borrowed time', and banded together to start their adventuring career as the Challengers of the Unknown.
Ace was the defacto team leader on several missions. Though having fought the good fight for several years now, Ace and the other Challengers of the Unknown are still active. For a brief time, Ace developed an interest in spiritualism and magic, but recently returned to his old classic-style heroic ways again.
When last seen, the team returned with Superboy from an adventure in Hypertime. The team had been waging guerrilla war against Black Zero (a Superboy variant). With Black Zero defeated, the team returns to Earth, but loses Red along the way. Reunited with Rocky in Metropolis and hosted by Rip Hunter, the original Challengers vow to explore Hypertime, "the greatest unknown," in an attempt to find Red.
- Although this character was originally introduced during DC's Earth-One era of publication, their existence following the events of the 1985-86 limited series Crisis on Infinite Earths remains intact. However, some elements of the character's Pre-Crisis history may have been altered or removed for Post-Crisis New Earth continuity, and should be considered apocryphal.
- 150 Appearances of Kyle Morgan (New Earth)
- 11 Images featuring Kyle Morgan (New Earth)
- 4 Quotations by or about Kyle Morgan (New Earth)
- Character Gallery: Kyle Morgan (New Earth)
- Ace Morgan at dccomics.com
- Ace Morgan at Wikipedia.org
- Ace Morgan profile at the Unofficial Guide to the DC Universe
- Challengers of the Unknown profile at Cosmic Teams