Cameos on the monitors before Jean Grey and Professor X are seen include quick shots of Domino, Cannonball and Magneto. Sabretooth is also seen once more in a clip from the original news cast in the beginning.
The creators of the show have altered the way Jubilee joined the X-Men. In the comic books, Jubilee met Dazzler, Storm, and Rogue in a shopping mall. In the issue, she made her way through Gateways portal back to the X-Men's base in the Australian Outback, as featured in Uncanny X-Men #244.
In the comic books, the Sentinels were introduced in X-Men (v1) #14. In addition, they were originally shown to be only slightly bigger than a normal human.
DEBUT: Cyclops, Wolverine, Storm, Rogue, Beast, Jubilee, Gambit, Jean Grey, Professor X, Robert Kelly, Morph, Henry Gyrich and the Sentinels.
When the Sentinel is at the mall, it does quick scans of those trying to help Jubilee and scans Storm at a height of 5'11", weight 127, Rogue at a height of 5'8", weight 120, and Gambit at a height of 6'2", weight 180. It lists Storm and Rogue as "unidentified mutant life forms" and Gambit as "unregistered mutant-expendable"