In Star Trek Into Darkness, English actress Alice Eve plays a controversial version of Dr. Carol Marcus in the Kelvin Timeline of J.J. Abrams’ Star Trek movies. Star Trek Into Darkness’ Dr. Carol Marcus is a Starfleet physicist who specializes in weaponry, and a potential love interest for Chris Pine’s Captain James T. Kirk. To hide the connection between herself and Admiral Alexander Marcus (Peter Weller), who released Khan Noonien Singh (Benedict Cumberbatch) from stasis, Alice Eve’s Carol Marcus goes by Carol Wallace when boarding the USS Enterprise.
https://screenrant.com/star-trek-alice-eve-carol-marcus-controversy-why/