text: SHADOWHUNTERS - "By The Light Of Dawn" - Valentine’s plan is in full effect and the Shadowhunters must act fast to save the Downworld in “By the Light of Dawn,” the spring finale of “Shadowhunters,” airing MONDAY, MARCH 6 (8:00 – 9:01 p.m. EST), on Freeform. (Freeform/John Medland) HARRY SHUM JR., KATHERINE MCNAMARA, DOMINIC SHERWOOD, ISAIAH MUSTAFA