Bender's eyes turned red after downloading a virus that was making him listen to other aliens that scammed the Planet express on the nude beach planet.

It was obvious when the Aliens came into the Planet express and made everyone work for them.

Leela tried to kick one of the Aliens, but Bender as he supposed to listen, came to save the aliens.

You had enough, and tried to get Bender to be his normal self. You and the group made a plan to tie him up, making time for you to program him.