https://www.cnet.com/news/black-mirror-boldly-goes-at-star-trek-u-s-s-callister/

On Tuesday, Netflix released a teaser for the fourth-season episode called "U.S.S. Callister," and Trek fans may feel as if they've been beamed aboard the Enterprise. Captain Daly (Jesse Plemons) welcomes Lieutenant Cole (Cristin Milioti), a new crew member, on board his starship. While things seem normal, this is "Black Mirror," so some kind of terrible twist is almost certainly lurking. 

Cole herself looks like a fun character -- while off-ship on a mission, she starts to whine about an overly dramatic villain and is immediately shushed by a more dedicated crew member.