Episode:Overflow

Professor Xavier foretells the destruction of Africa, by none other than Storm. When the X-Men investigate they discover an insidious plan by one of Xavier's oldest enemies.

Trivia

 * The first time Emma's diamond form has been scene in animation.

Continuity

 * First time Xavier gives Wolverine a mission to perform in order to prevent the nightmarish future.
 * Debut of the Shadow King and Storm. Though Storm appeared in she had no lines and only appeared briefly.

Background
This is the first episode that really is based on one of the classic stories rather an the reinterpretation of the first three episodes.

Kevin Michael Richardson, who voices the Shadow King, also voices and the tribal leader;  on ;, ,  , , an OsCorp Security Guard, and a thug on ; a security guard on ; and Dark Hulk on. He also did announcements for SMU undefined on Fox Kids.

Greg Johnson and Craig Kyle outlined the basic story and gave each script off to another writer. This way the series could maintain a continuity without the two being overwhelmed writing each and every episode.

Cerebro is portrayed several different ways throughout the season. This was because the producers could not agree on how it should look and kept changing it. Johnson and Kyle believe this version is one of the more successful versions.

Forge was brought into the series to provide some comic relief, since the rest of the cast is so dark and serious.

The shots of the rain hitting the water are all CGI.

The reason for the Wolverine-Emma subplot was to make her a part of the team. Johnson and Kyle felt that they couldn't have him doubt her for the entire season and they needed a reason for him to trust her.

The battle on the astral plane was meant to set up an event later in the series.

Reaction
"Arsenal" of Marvel Animation Age enjoyed having a good, evil supervillain for the X-Men to fight for once, rather than previous enemies that were doing bad things with good intentions. He also felt Shadow King and Storm's past was handled better than 's. He noted that since the episode only introduced two new characters it had time to develop the ones already established. He also enjoyed the subplot involving Emma and Wolverine. "This is a decent episode, nothing incredible. It has a serviceable villain which is overcome while several serial plots are pushed forward. It will be nobody’s favorite episode, but it is too good to call it filler."

On TV.com the episode has a rating of 8.4 Great.