sentences:  In 2014 David landed the role of SVR Resident Gennady Isakov in George Nolfi's spy drama Allegiance on NBC, co-starring Hope Davis, Scott Cohen and Breaking Bad's Giancarlo Esposito.David recurred on Madam Secretary as the Ukrainian Foreign Minister Luka Melnik and worked on Martin Scorsese's Vinyl for HBO, playing Hilly Crystal, the creator of the iconic NYC club CBGB.His most recent work is on the TV series Roeng, playing the Russian Astronaut, Sergei—from the creators of Netflix's Lilyhammer.