▁agent ▁and ▁super vis ory ▁special ▁agent ▁( season ▁ 1 0 ) ▁ ▁Cal la han , ▁as ▁mentioned ▁in ▁the ▁season ▁ 1 0 ▁premi ere , ▁previously ▁worked ▁under ▁And i ▁Sw ann ' s ▁team , ▁which ▁is ▁also ▁Ash ley ▁Se aver ' s ▁team ▁since ▁she ▁left ▁the ▁B AU . ▁She ▁is ▁a ▁" season ed ▁under cover ▁agent ▁whose ▁stell ar ▁work ▁at ▁the ▁F BI ▁has ▁land ed ▁her ▁a ▁cov et ed ▁position ▁with ▁the ▁Be havior al ▁Analysis ▁Unit ". ▁She ▁and ▁her ▁husband , ▁Chris , ▁have ▁been ▁the ▁guard ians ▁of ▁Kate ' s ▁te en age ▁nie ce , ▁Meg , ▁since ▁Meg ▁was ▁a ▁baby ▁following ▁her ▁parents ' ▁death s ▁in ▁the ▁September ▁ 1 1 , ▁ 2 0 0 1 , ▁attacks . ▁Kate ▁and ▁Chris ▁discover ▁they ▁are ▁expecting ▁a ▁baby ▁in ▁the ▁middle ▁of ▁season ▁ 1 0 , ▁coinc iding ▁with ▁the ▁actress ' s ▁real - life ▁pre gn ancy . ▁At ▁the ▁end ▁of ▁season ▁ 1 0 ▁she ▁dec ides ▁to ▁take ▁a ▁year ▁off ▁and ▁raise ▁her ▁baby . ▁As ▁of ▁season ▁ 1 3 , ▁she ▁has ▁not ▁returned , ▁but ▁producer ▁Er ica ▁Mess er ▁has ▁stated ▁the ▁door ▁was ▁open ▁should ▁H ew itt ▁choose ▁to ▁return ▁to ▁the ▁show . ▁▁ ▁T ara ▁Lewis ▁( A ish a ▁Ty ler ), ▁for ens ic ▁psych ologist ▁and ▁super vis ory ▁special ▁agent ▁( se