▁Sydney ' s ▁long standing ▁concerns ▁about ▁her ▁importance ▁in ▁her ▁father ' s ▁life . ▁ ▁Jack ▁lear ns ▁near ▁the ▁end ▁of ▁the ▁fourth ▁season ▁that ▁he ▁had ▁not ▁in ▁fact ▁killed ▁Ir ina , ▁but ▁had ▁shot ▁a ▁gen et ically ▁engine ered ▁imp ost or . ▁He ▁subsequently ▁reun ited ▁with ▁Ir ina , ▁who ▁ch ast ised ▁him ▁for ▁being ▁so ▁quick ▁to ▁r ush ▁to ▁judgment ▁about ▁her , ▁yet ▁also ▁said ▁that ▁she ▁understood ▁why ▁he ▁had ▁acted ▁to ▁protect ▁Sydney . ▁Following ▁Ir ina ' s ▁help ▁in ▁fo iling ▁the ▁end ▁game ▁of ▁her ▁sister ▁El ena , ▁Jack ▁dec ides ▁to ▁let ▁Ir ina ▁go ▁rather ▁than ▁return ▁her ▁to ▁federal ▁prison . ▁Hus band ▁and ▁wife ▁part ed ▁with ▁a ▁kiss . ▁ ▁In ▁Season ▁ 5 , ▁Sydney ▁is ▁expecting ▁her ▁first ▁child . ▁In ▁the ▁absence ▁of ▁Michael ▁V aug hn , ▁the ▁child ' s ▁father , ▁Jack ▁att ends ▁doctor ' s ▁vis its ▁with ▁Sydney ▁and ▁helps ▁her ▁to ▁assemble ▁a ▁c rib ▁for ▁his ▁grand child ' s ▁nur ser y . ▁However , ▁he ▁is ▁dist ract ed ▁by ▁the ▁presence ▁of ▁Ar vin ▁Slo ane ▁within ▁AP O , ▁a ▁presence ▁he ▁( as ▁the ▁new ▁director ▁of ▁the ▁black ▁o ps ▁unit ) ▁has ▁author ized ; ▁Slo ane ' s ▁behavior ▁appears ▁d ish on est , ▁and ▁although ▁Slo ane ▁has ▁admitted ▁some ▁of ▁his ▁lies , ▁Jack ▁remains ▁on ▁his