' s ▁robot ic ▁out la ws , ▁al ien ▁inv aders , ▁and ▁other ▁gal actic ▁thre ats . ▁And ▁he ' s ▁from ▁Earth . ▁ ▁Mark ▁G agli ardi ▁plays ▁S par ks ▁Nev ada ' s ▁trust y ▁native ▁Mart ian ▁side k ick , ▁Cro ach ▁the ▁Tra cker . ▁ ▁Bus y ▁Philipp s ▁plays ▁The ▁Red ▁Pla ins ▁R ider , ▁a ▁human ▁raised ▁by ▁Mart ians ▁who ▁r ides ▁the ▁red ▁pla ins ▁of ▁Mars ▁in ▁vig il ante ▁fashion . ▁ ▁Nathan ▁F ill ion ▁plays ▁C act oid ▁Jim , ▁wild ▁as ▁a ▁c act oid , ▁Mayor ▁of ▁Mars , ▁" K ing ▁of ▁the ▁Mart ian ▁Front ier ." ▁ ▁L inda ▁Card ell ini ▁plays ▁Reb e cca ▁Rose ▁R ush more , ▁a ▁popular ▁writer ▁of ▁space ▁cow boy ▁nov els ▁who ▁has ▁come ▁to ▁Mars ▁from ▁Earth ▁to ▁live ▁the ▁sort ▁of ▁advent ures ▁she ▁had ▁only ▁written ▁about . ▁ ▁Josh ▁Mal ina ▁plays ▁the ▁bar keep ▁of ▁the ▁Space ▁Sal oon . ▁He ▁does ▁not ▁want ▁any ▁trouble ▁in ▁his ▁place . ▁ ▁Jen ny ▁W ade ▁plays ▁Mer cy ▁L are do , ▁inter gal actic ▁b ount y ▁h unter ▁and ▁ex - g irl friend ▁of ▁S par ks ▁Nev ada ▁from ▁his ▁Space ▁Academy ▁days . ▁ ▁Mol ly ▁Qu inn ▁plays ▁P em ily ▁St all w ark , ▁winner ▁of ▁P un ishment ▁Soccer ▁and ▁S par ks ' ▁deput