"Gaslit" has a high-quality cast and production values, capturing the look and mood of the early '70s. But the tone is off-putting. Many scenes are played as broad farce, as if most of the key figures in the Watergate scandal were buffoons. These were corrupt people who made terrible blunders, but they were not all a bunch of clowns.
I think Sean Penn is very good as John Mitchell, but Julia Roberts could have put more a little more energy into her portrayal of Martha Mitchell, who was very flamboyant, colorful and opinionated. Dan Stevens as John Dean is a weak spot. He makes Dean seem very silly and clueless, and looks too hipster. These were Republicans! "Gaslit" explores an interesting episode in American political history, and includes many key facts, but the tone makes it seem a bit too much like a caricature.