Lauren Cohan, Mark O’Brien and Mia Tomlinson have joined the cast of “Stillwater,” Amazon Prime Video’s series adaptation of Chip Zdarsky and Ramón K Pérez’s graphic novel. Cohan joins the eight-episode series as Catherine ‘Cat’ Keegan, a former homecoming queen whose small-town charm has sharpened into something fiercer thanks to decades of old grudges and […]