What is associated with: boris godunovs death in 1605 brought on the age in russian history known as the time of these?

Based on the clue 'boris natasha would be driven nuts if they faced ...', what is the answer? Based on the clue 'boris badenov was her partner in crime dahlink', what is the answer? Based on the clue 'boris drubetskoy natasha rostova are 2 of the man...', what is the answer? Based on the clue 'boris godunov is the only opera completed by this ...', what is the answer? Based on the clue 'boris iii brought this balkan country into wwii', what is the answer? Based on the clue 'boris karloff did the raven with jack nicholson wh...', what is the answer? What is associated with: boris karloff was under wraps as this title egyptian in a 1932 film? What is referred to by 'boris pasternak'?