In Star Trek: Lower Decks Season 4, Beckett Mariner finds herself at a major crossroads. Promoted to Lieutenant Junior Grade at the start of the season, Mariner goes on a self-destructive spiral when her newly earned responsibilities awaken inner demons from her past. And in true Lower Decks fashion, one of these inner demons is personified. The return of Nicholas Locarno, a disgraced Starfleet cadet from Star Trek: The Next Generation, reveals that he has a secret shared history with Mariner.
Source：https://www.cbr.com/star-trek-lower-decks-season-4-tawny-newsome-interview/
