The first glimpse of the upcoming limited series shows us Mirren as the legendary monarch, who was Empress of Russia from 1762 until 1796, making her the country's longest-ruling female leader. The series will show us Catherine toward the end of her rule in the 18th century, when she begins a steamy relationship with Grigory Potemkin (Jason Clarke), a military leader. "When I was young I dreamed of freedom, I dreamed of breaking chains," Catherine can be heard saying in the trailer. "But as you get older, your choices narrow. So instead I gave us an empire, but I knew...