While still working on Buffy the Vampire Slayer , Benson wrote , directed , produced , edited , and acted in a movie called Chance ( 2002 ) . The movie also featured her Buffy co-star James Marsters . While still working on Buffy the Vampire Slayer , Benson wrote , directed , produced , edited , and acted in a digital video feature called Chance ( 2002 ) which also featured her Buffy co-star James Marsters .