Adam, Supergirl is not in the 14-dic box set. Discs 1-3 - Superman: the Movie Discs 4-6 - Superman II Discs 7-8 - Superman III Discs 9-10 - Superman IV Discs 11-12 - Superman Returns Disc 13 - Fleischer shorts Disc 14 - Look up in the Sky doc
As much as I don't care for 3 & 4, the bonus discs could be interesting, and besides, wanting the 10 other discs and not being excited about 4 is enough to get me to buy the box rather than pick up the 10 separately.