Toby has his eye fixed firmly on Jack's sister Nikki. He is desperate to impress her, but how? Given she's a swimming star, he decides his best chance is to get on the school swim team. There's only one problem - Toby's a pathetic swimmer! Toby uses wicked science to invent a body oil to help move through the water like a seal. This threatens Garth's tenuous position on the swim team and when Elizabeth learns what Toby's up to she intervenes, tampering with Toby's oil.