 These virtual versions of Jor-El and Lara remained as constructs within the Fortress throughout the series.Superman's symbol was given a Kryptonian origin in the film.Male Kryptonians were shown wearing unique symbols on the chests of their robes, similar to a family crest; Jor-El and Kal-El wore the familiar S-shield, which Lois Lane later assumed to be the letter "S" from the familiar Latin alphabet, and thus dubs him "Superman".