Rebus or Appointment in Beirut is a 1969 crime film directed by Nino Zanchin and starring Laurence Harvey and Ann-Margret. An international co-production, it was largely filmed in Venezuela, the UK and Lebanon. When an international casino crime ring is planning a big score at a fixed roulette game, the casino police enlists the help of Jeff Miller, an alcoholic croupier, to nab the bad guys. Jeff is attracted to Laura, a singer at the casino, but she prefers the company of the leader of the casino ring.