In the episode titled "Surprise!," Ben learns why Riley doesn't like celebrating her birthday and it's all his fault. He knows he needs to make it up to her and plans a perfect birthday surprise, but in typical Ben Wheeler fashion, disaster ensues. Bonnie realizes she may have made a mistake in filing Emma's parental rights paperwork and Ben doesn't officially have sole custody. Bonnie enlists Tucker's help in tracking down Emma's mother, Angela, to re-sign the papers, but bringing this baby mama back into their lives may spell trouble. Meanwhile, Amy calls Danny on his lingering feelings for Riley. The episode was written by "Baby Daddy" Creator and Executive Producer Dan Berendsen.