Gotham_Season 1_Episode 20_Under the Knife_Still Previous Published April 9, 2015 at 1950 × 1300 in ‘Gotham’ Season 1 – 13 New Stills From Episode 20, “Under the Knife” GOTHAM: Jason Lennon (guest star Milo Ventimiglia) has an ulterior motive for going home with Barbara in the ÒUnder the KnifeÓ episode of GOTHAM airing Monday, April 20 (8:00-9:00 PM ET/PT) on FOX. ©2015 Fox Broadcasting Co. Cr: Jessica Miglio/FOX GOTHAM: Jason Lennon (guest star Milo Ventimiglia) has an ulterior motive for going home with Barbara in the ÒUnder the KnifeÓ episode of GOTHAM airing Monday, April 20 (8:00-9:00 PM ET/PT) on FOX. ©2015 Fox Broadcasting Co. Cr: Jessica Miglio/FOX