Melinda Wrenn Schmidt is an American actress, best known for her starring role as NASA engineer and flight director Margo Madison in the Apple TV+ original science fiction space drama series For All Mankind. Other television roles include Julia Sagorsky in the period drama series Boardwalk Empire (2012-2013), as KGB handler Kate in the spy drama series The Americans (2014), as Dr Iris Campbell on the thriller series Person of Interest (2014-2016), as Megan Holter in the horror series Outcast (2016-2018). Her film roles include the horror film Preservation (2014), the biographical drama I Saw the Light (2015), the war film 13 Hours: The Secret Soldiers of Benghazi (2016), the romantic comedy, The Good Catholic (2017) and the science fiction horror film Nope (2022).