Ep 21. Nicky, Ricky, Dicky & Sicky

Nicky, Ricky, Dicky & Dawn season 2 episode 21, titled "Nicky, Ricky, Dicky & Sicky," revolves around the Harper Quadruplets' attempt to avoid catching the flu that is spreading throughout their school. However, despite their best efforts, all of them except for Nicky eventually fall sick and are confined to bedrest.

As a result, Nicky is left to take care of his siblings while also trying to attend school and complete his homework. With his siblings constantly bickering and demanding his attention, Nicky struggles to keep everything under control. Meanwhile, at school, Nicky is forced to compete in a science fair with his arch-nemesis, Avery.

As the rest of the siblings start to feel better, they become increasingly bored with being cooped up inside and decide to sneak out of the house to attend a concert. However, things quickly go awry when they find themselves stranded and lost in the city.

Meanwhile, Nicky is struggling to finish his science fair project and turns to his siblings for help. Despite their initial reluctance, the rest of the Quads pitch in to help Nicky complete his project in time for the competition.

The episode culminates in a high-stakes science fair, where the Quads' project is pitted against Avery's. While the competition is fierce, Nicky and his siblings ultimately come out on top thanks to their teamwork and ingenuity.

Overall, "Nicky, Ricky, Dicky & Sicky" is a heartwarming episode that showcases the importance of family and teamwork. Despite the challenges they face, the Harper Quads come together to support each other and ultimately emerge victorious.