ch et ▁on ▁the ▁B F 5 ' s ▁test ▁track , ▁but ▁was ▁later ▁rec ru ited ▁to ▁help ▁destroy ▁a ▁Red ▁Sent ient ▁sc anner . ▁As ▁a ▁kid ▁Dan ▁always ▁wanted ▁to ▁fight ▁al iens ▁and ▁Vert ▁rel ates ▁with ▁wanting ▁to ▁race ▁in ▁a ▁race ▁car . ▁At ▁the ▁end ▁of ▁the ▁episode , ▁he ▁was ▁given ▁a ▁communic ator ▁by ▁S age ▁and ▁was ▁made ▁an ▁honor ary ▁member ▁of ▁the ▁B F 5 . ▁After ▁Dan ▁Wh eld on ▁was ▁killed ▁in ▁a ▁crash ▁during ▁the ▁I Z OD ▁Ind y Car ▁World ▁Championship ▁race ▁in ▁Las ▁Veg as ▁on ▁October ▁ 1 6 , ▁ 2 0 1 1 , ▁the ▁television ▁film ▁" Full ▁Revolution " ▁was ▁dedicated ▁in ▁his ▁memory . ▁ ▁Neg ative ▁B F 5 ▁- ▁App ear ▁in ▁" Double ▁Down ." ▁Ev il ▁oppos ites ▁of ▁the ▁original ▁primary ▁members ▁of ▁B F 5 ▁from ▁a ▁parallel ▁universe . ▁They ▁each ▁have ▁their ▁Sent ient ▁ranking ▁symbols ▁painted ▁below ▁their ▁left ▁eye . ▁ ▁Sh adow ▁Speed ers ▁- ▁Deb ut ▁in ▁" The ▁Sh adow ▁Zone ." ▁Lost ▁Mult iverse ▁travel ers ▁who ▁remained ▁in ▁the ▁Sh adow ▁Zone ▁too ▁long ▁and ▁became ▁mind less ▁shadow ▁ra iders . ▁Their ▁only ▁purpose ▁is ▁to ▁trap ▁and ▁transform ▁living ▁be ings ▁into ▁Sh adow ▁Speed ers . ▁They ▁are ▁able ▁to ▁move ▁about ▁by ▁def ying ▁normal ▁laws ▁of ▁physics ▁and ▁constant ▁contact ▁with ▁them ▁will ▁eventually ▁turn ▁anyone ▁into