An Ace Between 2 Queens

In 1940, RAF pilot Archibald Chambers has been locked in an air battle for London's skies against the Nazi Luftwaffe. During one battle, Archie is caught in a rip through time & is flung back to 1560 during the reign of the virgin queen. Archie soon finds himself in the middle of a war between Queen Elizabeth I & her rival: Mary, Queen of Scots. Who will win the pilot? Set in S4.