Sullivan's Crossing has gone through some surprise cast changes - and twists - but is the hit show returning for season 4? Based on a book series by Robyn Carr, Sullivan's Crossing follows neurosurgeon Maggie (Morgan Kohan) as she returns to her hometown in rural Nova Scotia. She finds herself reconnecting with estranged father, Sully (Scott Patterson), newcomer Cal (Chad Michael Murray) and more members of the community. Sullivan's Crossing was previously renewed for a fourth season, which premiered March 22, 2026, on CTV.