...Nor Iron Bars a Cage

..Nor Iron Bars a Cage is the seventeen episode of Ben 10: Ultimate Alien.

Plot
To settle an old score. Kevin voluntarily returns to the Null Void prison he once escaped.

Major events

 * This is the first time that we see Kevin in Null Void, the last time was in Back With a Revenge.

Characters

 * Ben Tennyson
 * Gwen Tennyson
 * Kevin Levin