▁English ▁business man ▁Margaret ▁C ros field ▁( 1 8 5 9 – 1 9 5 2 ), ▁English ▁p ala e ont ologist ▁and ▁ge ologist ▁Philip ▁C ros field ▁( 1 9 2 4 – 2 0 1 3 ), ▁British ▁Ang lic an ▁priest ▁William ▁C ros field ▁( 1 8 3 8 – 1 9 0 9 ), ▁British ▁politician ▁ ▁See ▁also ▁C ros field ▁Electron ics , ▁British ▁electron ics ▁company ▁Cross field ▁( disambiguation ) ▁Cris field ▁( s urname ) ▁ ▁Category : English - language ▁s urn ames <0x0A> </s> ▁The ▁Sim ps ons ▁twenty - third ▁season ▁began ▁air ing ▁on ▁Fox ▁on ▁September ▁ 2 5 , ▁ 2 0 1 1 , ▁and ▁ended ▁May ▁ 2 0 , ▁ 2 0 1 2 . ▁ ▁The ▁show runner ▁for ▁the ▁season ▁was ▁Al ▁Jean , ▁with ▁three ▁episodes ▁ran ▁with ▁Matt ▁Sel man , ▁one ▁of ▁those ▁he ▁also ▁wrote ▁himself . ▁ ▁The ▁show ' s ▁ 5 0 0 th ▁episode , ▁" At ▁Long ▁Last ▁Le ave ", ▁a ired ▁February ▁ 1 9 , ▁ 2 0 1 2 . ▁ ▁Epis odes ▁ ▁Production ▁The ▁season ▁premi ere ▁episode ▁" The ▁Fal con ▁and ▁the ▁D ' oh man " ▁features ▁a ▁reference ▁to ▁the ▁previous ▁episode ▁of ▁the ▁series , ▁the ▁twenty - second ▁season ▁finale ▁" The ▁Ned - L iest ▁C atch " ▁that ▁a ired ▁May ▁ 2 2 , ▁