https://screenrant.com/star-trek-discovery-tng-chase-progenitors-explained/

The Progenitors were one of Captain Picard's most profound discoveries in Star Trek: The Next Generation, now Burnham resumes the chase in Discovery.

Who Is Doctor Vellek? TNG Romulan In Star Trek: Discovery Explained (https://screenrant.com/star-trek-discovery-tng-romulan-doctor-vellek/)

Star Trek: Discovery's Doctor Vellek is a 24th-century Romulan connected to a surprising revelation from a Star Trek: The Next Generation episode.