This DVD includes the episodes;
Night of The Sentinels Part 1 and 2- where the X-Men meet Jubilee for the first time,
Enter Magneto - featuring Magneto,
Deadly Reunions - featuring Sabretooth,
Captive Hearts - featuring the Morlocks,
Cold Vengeance - featuring rivalry between Wolverine and Sabretooth, and
Slave Island - featuring Cable.
I haven't put too much about the episode as I don't want to spoil them!
Easily the best cartoon ever made in my opinion! Although this series was aimed at children, so it's not as dark as the comics were in places, the animation still holds up today (a few good belly laughs at the lovely 90's fashions to boot!) If you think that you can just get season 1 as a reminder of why this series was so amazing you would be wrong, you'll soon want the whole set!