Episode #5 "The Cloud"
CHAKOTAY: We have a compliment of 38 photon torpedoes, captain.
JANEWAY: And no way to replace them after they're gone!
They fire off 93+ photon torpedoes over the seven seasons...
Also the TARDIS-like shuttlebay, which usually barely fits the Delta Flyer yet somehow fits not only the Flyer, but a much wider ship too in a suddenly far larger bay, in "Drive"
See the videos in my sig for a load more, covering all six series and 11 movies!