<P> Nancy Wheeler (portrayed by Natalia Dyer) is the daughter of Karen and Ted, older sister of Mike, and girlfriend of Steve Harrington . </P> <P> Jonathan Byers (portrayed by Charlie Heaton) is the older brother of Will Byers and the son of Joyce Byers . Considered an outsider at school, he is a quiet teenager and an aspiring photographer . He is very close with his mother and brother . </P> <P> Karen Wheeler (portrayed by Cara Buono) is the mother of teenaged Nancy, middle schooler Mike, and toddler Holly . </P> <P> Martin Brenner (portrayed by Matthew Modine) is the scientist in charge of Hawkins Laboratory and the experiments performed there . He is manipulative and remote . He and his team are searching for Eleven . </P>

Who plays mike's mom on stranger things