Alien from the dimension of Xarapion, when Carl Sands helped him from the Earth dimension, he gave him the dimensiometer device which Sands used as the Shadow Thief. Thar Dan would aid Hawkman and Hawkgirl in defeating Shadow Thief on a number of occasions.

  • This version of Thar Dan (Earth-One), including all history and corresponding appearances, was initially erased from existence following the collapse of the original Multiverse in the 1985–86 Crisis on Infinite Earths limited series. However the ending of Convergence retroactively prevented that collapse, saving all the alternate realities, though in an "evolved" form. Even though versions of the character may have since appeared, this information does not apply to those versions.