Watch Opportunity Knocks (1990) HD Full Movie Free on solarmovie.do. Watch Opportunity Knocks (1990) online free. Two con men hide out in a house while the owner is away; one of them assumes the identity of the abs...Two con men hide out in a house while the owner is away; one of them assumes the identity of the absent house sitter when the owner's relatives come to visit, only for further complications to set in.