Brown's return to Fox News comes shortly after his loss to incumbent Jeanne Shaheen (D) in the New Hampshire Senate race.
Brown first joined Fox News as a contributor in February 2013. His contract was renewed in February 2014, but the network cut ties with Brown in March 2014, after he took steps toward another Senate run.
Fox News told the Boston Herald Brown would appear on the show "Outnumbered" next Tuesday at 12 p.m. ET.
Read more on Brown returning to Fox News at the Boston Herald.