I have to admit that my Star Trek knowledge is pretty superficial, so that definitely increased the challenge for me, but it wasn't too bad all things considered! Had to use a little Google here and there (I managed to put 18A18AActor in 21A[---------] together after a few crossers, but 25A25AActor in 21A[---------] eluded me), and I forgot my instrument names and had to check the puzzle to realize it was CELESTA31AHeavenly-sounding instrument[-------] and not CELESTE. I have to imagine this was a very nice treat for a true Trekkie, since even I still enjoyed it!