This spy thriller from future Death Wish (1974) director Michael Winner stars Burt Lancaster as the enigmatic Cross, a CIA agent who has hired a government assassin, Jean Laurier (Alain Delon), to kill an Arab terrorist. Once they return home, Laurier is arrested by his superior, McLeod (John Colicos), who wants to know why Cross is still alive, as Laurier was ordered to kill him as well. Laurier doesn't think that Cross is guilty of the crime, but he relents and agrees to carry out the contract for a higher price. Cross, suspected of selling secrets to the Soviets, learns that his life is in danger and flees to Vienna, where he is aided by a former comrade-in-arms from WWII, the sympathetic KGB agent Sergei Zharkov (Paul Scofield). When Cross learns that his wife (Joanne Linville) has been murdered by McLeod, he returns to the U.S. and kills him, leading to a bloody final confrontation with a reluctant Laurier, who is shocked to discover that his lover (Gayle Hunnicutt) is in league with Cross. Scorpio (1973) was the writing debut of David W. Rintels, who went on to author several critically respected made-for-TV films.
~ Karl Williams, All Movie Guide