Rex the Wonder Dog leaped into comics with his own bi-monthly series, kicking off with an adventure following the Trail of the flower of evil written by Robert Kanigher and drawn by Alex Toth. Possibly named after a canine silent movie star of the 1920s, Rex the Wonder Dog had been selected by a U.S. Army doctor to be test subject for super soldier serum which gave him incredible strength, speed, stamina and intelligence. After serving in WWII and Korea, the white German Shepherd came home with his handler Major Dennis and embarked upon a 46 issue run of heroic adventures, ranging from serving as a small town sheriff to bullfighting and solving interstellar crimes.