Some releases of season 1 have this listed as episode 20, with Eye of the Beholder (1993) as episode 19.
The Bible verse Cahill quotes while killing Elaine's client Charles is Leviticus 20:10. He quotes the King James Version, but leaves out a few words. The entire verse reads: "And the man that committeth adultery with another man's wife, even he that committeth adultery with his neighbour's wife, the adulterer and the adulteress shall surely be put to death."