Director of this epsiode, Adam Nimoy, is the son of actor Leonard Nimoy.
A character is named Isoceles. An isosceles triangle is one with only two equal sides.
At 17:51 Iolaus asks "And the truth will set them free?". He is paraphrasing Jesus in John 8:31-32 who said "and the truth will set you free".
At 40:11 Hercules says "Knowledge is power". The phrase is first attributed to Sir Francis Bacon in 1597.
When Iolaus breaks a hole through the door of Lilith's house and pokes his head in that's clearly a nod to Jack Nicholson's iconic performance in The Shining.