Watch Stranger on the Third Floor (1940) (1940) HD Full Movie Free on solarmovie.do. Watch Stranger on the Third Floor (1940) (1940) online free. An aspiring reporter is the key witness at the murder trial of a young man accused of cutting a caf�...An aspiring reporter is the key witness at the murder trial of a young man accused of cutting a café owner's throat and is soon accused of a similar crime himself.