The Number 23

The Number 23 is the sixty-seventh episode of Ben 10: The Omniwars and the seventh episode in the fourth season.

Plot
Ben and Sarth have to resolve a battle between their dimensional counterparts.

Characters

 * Ben Tennyson
 * Sarth Starth (first appearance; in The Omniwars)
 * Ben Tennyson (Dimension 23)
 * Sarth 23