In the combustible action franchise’s final installment, maverick detectives Martin Riggs and Roger Murtaugh square off against Asian mobster Wah Sing Ku, who’s up to his neck in slave trading…

Veteran buttoned-down LAPD detective Roger Murtaugh is partnered with unhinged cop Martin Riggs, who — distraught after his wife’s death — has a death wish and takes unnecessary risks with…