John Janus was a double agent really working for S.P.I.D.E.R. but, when he was given the Menthor helmet, he got mental powers with a side-effect: the helmet made him good and the effect slowly became more permanent.

He was killed in action in issue 7 of ''T.H.U.N.D.E.R. Agents''.

*T.H.U.N.D.E.R. Agents #1-7
*Menthor #1

Tower Comics never registered its titles with the US copyright office and also did not include a correct copyright notice on their books. According to US copyright law all works published between 1923-1977 that did not comply with copyright law became public domain upon publication.

*[http://www.internationalhero.co.uk/m/menthor.htm International Hero]
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