Like all great science fiction series, Doctor Who at its best is both a fun-filled romp through space and time with a social allegory weaved into the narrative. To celebrate its 60th anniversary, a series of three specials bring back David Tennant as the Fourteenth Doctor, and his companion Donna Noble, played by Catharine Tate. Doctor Who's "The Star Beast" is sci-fi at its best because while it delivered everything fans wanted, it also told a powerful story about appearance and identity. The special is also the debut of once-and-future Doctor Who showrunner Russell T Davies for his second spin in control of the TARDIS.
Source:https://www.cbr.com/doctor-who-the-star-beast-explore-identity/