The series ran through "All Star Western" #116 (1961) after which they were replaced by another feature, and were unseen until "Showcase" #72 (February 1968) when a story was reprinted under the banner, "Top Gun", a oneshot filler issue. In 1973 they were given a short-lived title. The Twins appeared in "All-Star Squadron" during the "Crisis on Infinite Earths", at which point it is revealed they reside on Earth-Two. Their origin was told in "Secret Origins" vol. 2 #48 in April 1990.