An absolute 9 for me. Really enjoyed that episode. This was Trek , through and through. Some excellent character moments, especially between Michael/Saru, and Tilly/Stamets. Doug Jones and SMG knocked it out of the park, performance wise. Nice use of the crew ensemble, some nice humour (loved the tower of Babel Universal Translator malfunction!), just an all round great character piece. With a TNG esque contact with an organic space life form.
Big improvement, for me, over last week's episode, which felt like a season 1 leftover IMO.
My only complaint , really, is not enough Number 1. Really good episode