Season 3 Episode 13
Episode aired february 04, 2002
angel and his friends attend a ballet, where angel realizes he saw the exact same dancers on stage over a hundred years ago.
according to dvd commentary, when summer glau finished her four-page monologue, she received a standing ovation from the crew and the extras remaining on set from the theater scene. this eventually led to comedian jeff laub suggesting that joss whedon have her read for the role of river tam on his new series, firefly (2002).