Watch On the Line (2022) HD Full Movie Free on solarmovie.do. Watch On the Line (2022) online free. A host takes a call, where an unknown person threatens to kill the showman's entire family on air. T...A host takes a call, where an unknown person threatens to kill the showman's entire family on air. To save loved ones, the radio host will have to play a survival game and the only way to win is to find out the identity of the criminal.