Watch Behind the Line: Escape to Dunkirk (2020) HD Full Movie Free on SolarMovie. Watch Behind the Line: Escape to Dunkirk (2020) online free. A group of British soldiers retreating from the Germans toward Dunkirk during World War II are captu...A group of British soldiers retreating from the Germans toward Dunkirk during World War II are captured. A renowned British boxer among them is forced into the ring to fight an equally talented German boxer as the Brits plan to escape.