Complex sentence: Craig's third Bond film, "Skyfall", premiered in 2012 and is currently the highest-grossing film in the series, was the highest-grossing film in the UK until 2015 and the fifteenth highest-grossing film of all time.
Split into simpler sentences: Craig's third Bond film, "Skyfall", premiered in 2012 and is currently the highest-grossing film in the series. It was the highest-grossing film in the UK until 2015 and the fifteenth highest-grossing film of all time.