▁the ▁relationship ▁is ▁not ▁new . ▁ ▁Through out ▁season ▁seven , ▁the ▁audience ▁sees ▁Gr iss om ▁and ▁S ara ▁as ▁a ▁couple , ▁but ▁the ▁relationship ▁is ▁kept ▁secret ▁from ▁the ▁others ▁in ▁the ▁lab ▁until ▁S ara ' s ▁ab du ction ▁by ▁The ▁M ini ature ▁K iller ▁in ▁the ▁season ▁finale ▁when ▁Gr iss om ▁unw itting ly ▁refers ▁to ▁his ▁feelings ▁for ▁S ara . ▁During ▁season ▁eight , ▁they ▁have ▁become ▁engaged . ▁When ▁J or ja ▁Fox ▁decided ▁to ▁leave ▁the ▁show , ▁both ▁she ▁and ▁the ▁writers ▁decided ▁not ▁to ▁kill ▁the ▁character , ▁so ▁as ▁to ▁leave ▁the ▁doors ▁open ▁for ▁a ▁possible ▁com eb ack . ▁Con sequently , ▁S ara ▁Sid le ▁is ▁sub mer ged ▁into ▁de pression ▁after ▁her ▁kid nap ▁in ▁the ▁season ▁seven ▁finale , ▁and , ▁even ▁though ▁she ▁accepts ▁Gr iss om ' s ▁marriage ▁proposal ▁on ▁the ▁season ' s ▁fourth ▁episode , ▁she ▁shows ▁signs ▁of ▁burn out ▁during ▁the ▁subsequent ▁episodes , ▁breaking ▁down ▁on ▁the ▁season ' s ▁sevent h ▁episode , ▁leaving ▁Las ▁Veg as ▁and ▁the ▁CS Is ▁with ▁only ▁a ▁good bye ▁letter ▁for ▁Gr iss om ▁and ▁a ▁good ▁luck ▁note ▁for ▁Ron nie ▁Lake . ▁In ▁the ▁letter ▁she ▁claims ▁that ▁ever ▁since ▁her ▁father ' s ▁death ▁she ▁has ▁been ▁dealing ▁with ▁" g hosts " ▁and ▁that ▁she ▁now ▁needs ▁to ▁go ▁away ▁and ▁deal ▁with ▁them ▁before ▁self - dest ruct ing .