When Spike crawls out from under the bed at 221B, he crawls through the puddle of vomit. However, his clothes are never shown to have vomit on them, even though he drags his shoulder and arm right through it.
Bea uses the term "clone." This term would not be coined until 1903 and was originally used to refer to the technique of propagating new plants using cuttings, bulbs, or buds. Bea should have used the terms golem (a creature made from the earth to do its creator's bidding) or doppelganger.