The writer’s were obviously thinking at one point “How can we get more Seven?”. Then they hit upon, she can play other characters. Though having said that, Seven's acting as the Doctor is probably the episode’s best part.
At the start of the episode I got excited because I thought it was DS9 but no, they were just using the same comet as their credits. Seven, Harry and the Doctor are studying said comet in the Delta Flyer II when they’re attacked by a ship who hate holograms, probably from watching Red Dwarf The Doctor ends up possessing Seven via her implants which no-one notices because they’ve obviously had a stroke. The aliens take Harry and Doctor/Seven prisoner, and he already finds the smell of Harry repellent. Meanwhile on Voyager, Tuvok is undergoing Pon Farr which he doesn’t seem to mind telling Paris all about, the pervert. Captain Ranek on the alien ship wants to know more about the Delta Flyer 2.1 so asks the Doctor/Seven. He tells him about the replicator and enjoys eating food for the first time and then they all get drunk together. First thing I can agree with. On returning to the cell, they separate and Seven is annoyed with the Doctor abusing her body but they compromise to free themselves from the aliens. Back on Voyager, Paris suggests to Tuvok he use the holodeck to help himself out. No-one’s ever suggested that before, oh wait, they have in the Vorik Pon Farr episode. Voyager is then escorted through the same region by more of the aliens who demand the holodeck is turned off. Finally, someone with sense. On the other alien ship, the Doctor/Seven is kissed by Ranek, and they walk off in disgust. What Harry wouldn’t give to be in that position. Either of them. Doctor/Seven then meets with Ranek again but sedates him so that contact Voyager via the Delta Flyer XP. Yet again, no-one realises it’s the Doctor. Eventually they’re caught again but Voyager has come to the rescue. Ranek’s been injured though, so the Doctor stays to operate, thusly the aliens all change their opinions on holograms just in time for the end.