▁this ▁it ▁has ▁also ▁gained ▁a ▁considerable ▁following ▁of ▁older ▁view ers ▁outside ▁of ▁its ▁intended ▁age ▁range . ▁ ▁Char acters ▁ ▁Par ents ▁Brian ▁Johnson ▁( T ony ▁Gard ner ) ▁( 1 9 9 9 – 2 0 0 6 ): ▁Brian ▁is ▁a ▁Val ux ian ▁al ien ▁and ▁the ▁cause ▁of ▁the ▁Joh ns ons ' ▁crash - land ing ▁on ▁Earth . ▁O ften ▁child like , ▁he ▁follows ▁c raz es ▁and ▁f ads ▁and ▁gets ▁b ored ▁easily ▁and ▁is ▁easily ▁su cker ed ▁into ▁Josh ' s ▁sc ams . ▁He ▁has ▁little ▁or ▁no ▁concept ▁of ▁mor ality , ▁often ▁creating ▁difficult ▁situations ▁for ▁the ▁characters ▁and ▁only ▁rect ifying ▁them ▁because ▁he ▁is ▁told ▁to . ▁He ▁does ▁care ▁for ▁and ▁like ▁his ▁family ▁but ▁will ▁often ▁be ▁very ▁self ish ▁or ▁when ▁well ▁meaning ▁cause ▁cha os ▁through ▁his ▁ignor ance ▁of ▁earth ▁culture . ▁Though ▁he ▁can ▁morph ▁at ▁will , ▁his ▁aller gy ▁to ▁ice ▁cre am ▁makes ▁him ▁grow ▁mo ose ' s ▁ant lers ▁invol unt arily ▁whenever ▁he ▁e ats ▁it . ▁He ▁is , ▁despite ▁his ▁person ality , ▁an ▁excellent ▁scient ist , ▁a ▁trait ▁that ▁Lucy ▁appreci ates . ▁Soph ie ▁Johnson ▁( Bar bara ▁Dur kin ) ▁( 1 9 9 9 – 2 0 0 0 , ▁ 2 0 0 5 ) ▁and ▁( Car la ▁M end on ça ) ▁( 2 0 0 1 – 2 0 0