Double Impact is a 1991 American action film written and directed by Sheldon Lettich, and written, produced by and starring Jean-Claude Van Damme as Chad and Alex Wagner. The film marks Van Damme's third collaboration with director Sheldon Lettich (who wrote Bloodsport and directed Lionheart) and second collaboration with Bolo Yeung (the first being Bloodsport in 1988). Double Impact was released in the United States on August 9, 1991. Plot In Hong Kong during the year 1966, business partners Paul Wagner and Nigel Griffith open the Victoria Harbour Tunnel. Paul attends with his wife Katherine and their identical twin infant sons, Chad and Alex. After the celebration, the family is followed home by their bodyguard, Frank Avery, whom they dismiss. Once he leaves, a Triad hit squad follows them. A shootout ensues, in which Paul is killed. Katherine begs the Triads to spare the twins but is killed by Moon, the top henchman. Their maid is able to escape with Alex and Frank eventually saves Chad; the maid leaves Alex at a Hong Kong orphanage and Frank raises Chad in France. 25 years later in 1991, Chad and Frank are running a successful martial arts dojo in Los Angeles when Frank tells a surprised Chad about a new "business" in Hong Kong. The two go to a mahjong parlor and a woman, mistaking Chad for Alex, takes him back to Alex's room. When Alex arrives, he knocks out Chad for being with his girlfriend, Danielle Wilde. Frank tells them they are identical twin brothers and they need to join together to take down Griffith and get their part of the royalties from the tunnel, but Chad and Alex initially do not get along with each other. Alex takes them out on his boat to sell smuggled Mercedes and cigarettes to some Chinese buyers, but the Hong Kong Police arrive and Chad dumps the cars to escape the cops faster. Back in Hong Kong, some thugs kidnap and beat up Chad (mistaking him for Alex) when he refuses to work for their leader, Raymond Zhang. Danielle, who works for Griffith, begins checking his private files for information, but she is being watched closely by Griffith's bodyguard, Kara. Alex takes Chad and Frank to an abandoned hotel on an island to conduct their operations. With intelligence from Danielle, they attack a drug operation and blow it up. Next, they attack a club