NENT

CANNES  —  The four-part drama “Litvinenko,” starring Scottish actor David Tennant, has sold to more than 80 international markets, ahead of its debut on the new ITV streaming service, ITVX in the U.K., and on Nent Group’s Viaplay streaming service in the Nordics, Netherlands, Poland and the Baltics. AMC Networks’ Sundance Now…