▁Mar sd in . ▁ ▁Chris ▁Wood ▁as ▁Mon - El ▁( se asons ▁ 2 – 3 ; ▁guest ▁season ▁ 5 ): ▁A ▁prince ▁from ▁the ▁planet ▁D ax am ▁with ▁similar ▁powers ▁to ▁Super man ▁and ▁Super g irl , ▁Mon - El ▁lands ▁on ▁Earth ▁in ▁the ▁pod ▁at ▁the ▁end ▁of ▁season ▁one . ▁ ▁Flor iana ▁Lima ▁as ▁Mag gie ▁S aw yer ▁( season ▁ 2 ; ▁guest ▁season ▁ 3 ): ▁A ▁detect ive ▁for ▁the ▁National ▁City ▁Police ▁Department ▁who ▁takes ▁a ▁special ▁interest ▁in ▁the ▁cases ▁involving ▁al iens ▁and ▁met ah um ans . ▁Lima ▁became ▁a ▁rec urr ing ▁actress ▁for ▁the ▁third ▁season , ▁depart ing ▁in ▁the ▁season ' s ▁fifth ▁episode . ▁Lima ▁noted ▁the ▁role ▁was ▁only ▁intended ▁to ▁last ▁for ▁one ▁season . ▁ ▁K atie ▁Mc Gr ath ▁as ▁L ena ▁L ut hor ▁( season ▁ 3 – present ; ▁rec urr ing ▁season ▁ 2 ): The ▁CE O ▁of ▁L - Cor p ▁( former ly ▁known ▁as ▁L ut hor ▁Cor p ) ▁and ▁the ▁younger ▁pat ernal ▁half - s ister ▁of ▁Lex ▁L ut hor . ▁She ▁arriv es ▁in ▁National ▁City ▁after ▁Lex ▁has ▁been ▁in car cer ated , ▁hoping ▁to ▁re brand ▁L ut hor ▁Cor p ▁as ▁a ▁force ▁for ▁good . ▁As ▁the ▁daughter ▁of ▁Lion el ▁L ut hor , ▁to ▁whom ▁she ▁is ▁close , ▁L ena ▁tries ▁to ▁re de em