is bleach episode 42 filler?

As he rests in his cell with his arms restrained, 6th Division Lieutenant Renji Abarai is confronted by his Zanpakutō Spirit, Zabimaru, who berates him for still not being fully recovered. With Renji bemoaning this being the first thing Zabimaru has said to him in a long time, Zabimaru asserts that they are fully recovered and ready to fight any time, which means Renji must follow suit and heal quickly so they can fight Zangetsu once more.