▁with ▁di atom ace ous ▁earth . ▁By ▁the ▁distinct ive ▁damage ▁done ▁to ▁her ▁finger ▁p ads ▁and ▁the ▁way ▁the ▁body ▁was ▁hidden , ▁the ▁team ▁determ ines ▁that ▁the ▁murder er ▁had ▁put ▁a ▁lot ▁of ▁effort ▁into ▁hiding ▁the ▁body . ▁H od g ins ▁also ▁reve als ▁that ▁Cle o ▁was ▁taking ▁medicine ▁for ▁her ▁de pression , ▁while ▁B ren nan ▁real izes ▁that ▁the ▁small ▁b ones ▁found ▁with ▁Cle o ' s ▁body ▁are ▁not ▁f rog ▁b ones ▁but ▁f etal ▁ear ▁b ones , ▁indicating ▁Cle o ▁Ell er ▁was ▁pre gn ant . ▁ ▁H od g ins , ▁a ▁dev out ▁consp i racy ▁the or ist , ▁convin ces ▁B ren nan ▁that ▁they ▁may ▁never ▁find ▁the ▁truth ▁because ▁Senator ▁Beth le hem ▁will ▁imp ede ▁the ▁investigation . ▁Without ▁telling ▁Bo oth , ▁B ren nan ▁reck lessly ▁confront s ▁the ▁Senator . ▁Con sequently , ▁Deput y ▁Director ▁C ull en ▁removes ▁Bo oth ▁from ▁the ▁case , ▁but ▁B ren nan ▁ref uses ▁to ▁give ▁up . ▁With ▁the ▁help ▁of ▁her ▁fellow ▁scient ists , ▁she ▁un co vers ▁evidence ▁that ▁Cle o ▁Ell er ' s ▁boy friend , ▁Ken ▁Thompson , ▁had ▁killed ▁Cle o ▁because ▁he ▁fe ared ▁the ▁sc andal ▁of ▁Cle o ' s ▁pre gn ancy ▁would ▁affect ▁his ▁career ▁neg atively . ▁ ▁Cultural ▁references ▁Al most ▁every ▁episode ▁of ▁Season ▁ 1 ▁contains ▁a ▁popular ▁culture ▁reference