▁the ▁best ▁of ▁him . ▁Rh etta ▁Rod rig uez ▁( La ura ▁San ▁Gia como ): ▁Grace ' s ▁best ▁friend ▁since ▁child hood , ▁and ▁a ▁police ▁for ens ics ▁special ist . ▁ ▁A ▁dev out ▁Catholic ▁with ▁the ▁curiosity ▁of ▁a ▁scient ist , ▁Rh etta ▁is ▁fasc in ated ▁by ▁Grace ' s ▁enc oun ters ▁with ▁Earl . ▁But ch ▁Ada ▁( B a iley ▁Ch ase ): ▁ ▁a ▁fellow ▁detect ive ▁in ▁the ▁Major ▁Cr imes ▁squad , ▁he ▁has ▁a ▁long ▁history ▁with ▁Grace ▁and ▁has ▁been ▁at ▁odd s ▁with ▁Ham ▁over ▁this . ▁But ch ▁played ▁football ▁for ▁the ▁Texas ▁Long horn s , ▁and ▁finds ▁himself ▁a ▁very ▁lon ely ▁fish ▁in ▁a ▁sea ▁of ▁Oklahoma ▁So on er ▁fans . ▁Bobby ▁Still water ▁( G reg ory ▁Norman ▁Cruz ): ▁But ch ' s ▁police ▁partner , ▁Bobby ▁is ▁the ▁steady ▁family ▁man ▁of ▁the ▁group . ▁ ▁Bobby ▁is ▁of ▁mixed ▁Native ▁American ▁and ▁Mexican ▁her itage . ▁Captain ▁Kate ▁Perry ▁( L or raine ▁T ouss aint ): ▁The ▁super visor ▁of ▁the ▁Major ▁Cr imes ▁squad , ▁rep laces ▁L t . ▁Y uk on ▁after ▁he ▁is ▁killed ▁by ▁his ▁brother . ▁Kate ▁Perry ▁once ▁worked ▁the ▁streets ▁with ▁Grace , ▁but ▁she ▁now ▁has ▁to ▁make ▁dec isions ▁based ▁on ▁the ▁bigger ▁picture . ▁Clay ▁Norman ▁( D yl an ▁Min net te ): ▁Clay ▁is ▁the ▁young ▁son ▁of ▁Grace ' s ▁late ▁sister