Ross Fishman is one of Lois Griffin's old boyfriends. In the episode "Stuck Together, Torn Apart", the two catch up at CostMart. He reveals that he recently separated from his wife, with whom he had at least one child. After initially declining the invitation for coffee, Lois sneaks out under her husband's jealousy. When Peter spots them, it leads to a trial separation.
Ross is reported to return in "Into Fat Air", which will bring back Peter's competitive streak and lead the Griffins to climb Mount Everest. [1]