1x21 - The Melancholy of Haruhi Suzumiya

Preparation for the SOS Brigade's short film continues, with the main characters' roles eerily matching their actual nature. On the first day of filming, the club shoots two commercials advertising their sponsors, before filming several scenes in a park, at which point Kyon learns that Haruhi doesn't have a written script and is planning on ironing out the plot in the editing phase.