Director Richard Donner's seminal "buddy" actioner "Lethal Weapon" (1987) finds veteran L.A. detective Roger Murtaugh (Danny Glover) saddled with new partner Martin Riggs (Mel Gibson), a wildman whose memories of Vietnam and his wife's death edge him ever closer to psychosis. Can the mismatched duo bring down a heroin ring? With Gary Busey. In "Lethal Weapon 2" (1989), Riggs (Gibson) and Murtaugh (Glover) take on a drug operation backed by South African diplomats while "babysitting" a government witness (Joe Pesci). With Patsy Kensit. Murtaugh (Glover) is ready to retire, but first, he and Riggs (Gibson) will have to bust up a stolen weapons ring, in "Lethal Weapon 3" (1992). Pesci, Rene Russo co-star. And, Riggs (Gibson) has settled down with a fellow cop (Russo), and Murtaugh (Glover) is about to become a grandfather, but that won't stop them from battling Chinese counterfeiters involved in immigrant smuggling. "Lethal Weapon 4" (1998) co-stars Pesci, Chris Rock, Jet Li. 7 3/4 hrs. total on four discs. Widescreen (Enhanced); Soundtrack: English DTS HD 5.1 Master Audio; Subtitles: English (SDH), French, Spanish; deleted scenes; audio commentary; featurettes; theatrical trailers; outtakes; music video.