Revealing mistake: When Xena 'dies', her pulse is checked, and they can't find one, yet you can see her pulse in her neck. (00:30:30)
Revealing mistake: If you look carefully when Neelix shoots the bins of water causing the water to rush out you can see a faucet opening on one of the bins.
Gillian Of The Spirits - S2-E3
Revealing mistake: When the nude lady closes the door, look closely - you can see the edge of her pink bra right under the bar. (00:43:30)