Seth Green said in an Ultimate TV chat that the line, “I mock you with my monkey pants” in 2.10 What’s My Line? (Part Two) was an idea of Alyson Hannigan’s. …

In 1.09 The Puppet Show, Xander holds up Sid the Dummy and says, “Redrum, Redrum”. This was an ad lib by Nicholas Brendon.

At the end of 1.09 The Puppet Show, Xander, Buffy and Willow nervously performed a piece from the Greek tragedy Oedipus Rex, written by the Greek playwright Sophocles (496-406 B.C.). Xander …

In 7.22 Chosen, Andrew flips back his red hood and says, “step back, girlfriend”. This was an ad lib on the part of Tom Lenk.