She is best known for starring as Sylvia Tilly in the Paramount+ science fiction drama series Star Trek: Discovery (2017-present). After a period of reflection, Tilly realizes this is the change of direction she spent the past 3 episodes searching for, and accepts the gig, bidding farewell to Burnham before warping away from Discovery. ( DIS: " Context Is for Kings ") According to StarTrek.com, Sylvia Tilly was born with laryngotracheal stenosis. She plays an important role in Marah's Wedding, so that's why they need to wait on her. Let's get into the details of the actress's weight gain, which has also been linked to her pregnancy. When Mary Wisemans Lt. Sylvia Tilly left the USS Discovery for a job at the new Starfleet Academy in the fourth episode of season four, it was promised she would be back. We earn a commission for products purchased through some links in this article. The Enterprise D was the only place we saw a councelor. Mary began her acting career in 2012 with a modest role in Senior Server. However, Tilly's rise to Lieutenant in Thursday's episode of Star Trek: Discovery did not invoke feelings of joy. Star Trek: Discovery Season 4 Episode 4 Review: All Is Possible Its very possible Mary Wiseman wanted off the show, or needed a bit of a break. Tilly's Discovery Season 4 Exit & Season 5 Future Explained - Screen Rant But you know, shes so busy and doing awesome other things. But its the elephant we have in the room, these days. Why did they do that? Maybe Tilly has rejoined the crew following a stint teaching at the Academy, following the path of others who have traded the Star Trek Starfleet Academy classroom for active service. 108 comments so far. None of those thinks make a lick of sense. Discovery was a science ship first, which was pressed into service. She let go in S4 of her parents expectations and embraced a new purpose.