Let There Be Light (2017) on Netflix

Plot summary

Dr. Sol Harkens is the world's most famous atheist, and he has just beaten a Christian leader in a public debate. At the party for his book he drinks heavily and tries to take his girlfriend home; she refuses. He drives off drunk, takes a call from his publicist about more appearances, and crashes into a construction site. Surrounded by a carnival-like tunnel of light, he sees his young son David, who died of cancer a few years earlier; David tells him he is all right and to let God's love fill him. Harkens regains consciousness after four minutes clinically dead and finds his Christian ex-wife Katy beside him. His doctor calls the visions adrenal brain surges from trauma. Harkens wrestles with science against faith.