Just 2 Tribbles! This type of story has been done before in other Star Trek series. Having Rene Auberjonois from DS9 fame guest star just adds to the been there done that vibe to this episode.
The trader that told them about the haunted ship was played by Tom Bergeron. The Kantares wear the same crappy outfits that are shown all the time in TNG! I did like the interplay between Trip and Liana with T'Pol throwing shade. Also, nice mention by Trip of needing a hologram doctor!
Captain's Log - "I've made all the friends I need."-Ezral