Frenk and Dyvud Retzun, alias Double Header were from Janus, a world where a species starts as conjoined twins and eventually split into two identical beings.

While this is an interesting biological process, it isn't exactly an impressive power.

The Janusians were revealed to have been a group of genetically engineered humanoids who were part of a eugenics program to create superpowered beings undertaken by a species called the Dominators. Lar Gand rescued the test subjects and relocated them to new lives on other worlds. Those with this power placed on this world, making this new planet their home.

The pair combined are excellent fighters, but Frenk and Dyvud's inability to cooperate led the Legion to reject them. The pair joined the Legion of Substitute Heroes in an auxiliary status, but showed up for meetings infrequently. They did, however, manage to make an appearance at the Wedding Ceremony of Bouncing Boy and Duo Damsel.

Frenk and Dyvud apparently stayed on with the Subs. It was mentioned that they were killed in Earth-Man's assault on the Subs and other aliens on Earth.


  • Janusian Physiology: Frenk and Dyvud Retzun has the powers of a typical Janusian. The Janusian's are born as one being with two heads and over time split into two complete entities.



  • Two Heads: Frenk and Dyvud Retzun have two heads and two brains but one body. As brothers they hate each other and can never make their minds up what to do in a situation. If they could only agree they would be a formidable opponent in battle, but they would rather argue amongst themselves.



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