Steven celebrates his birthday, but realizes he is getting older. As he worries about his age, his physical appearances reflects his mental age.

It's Angelica's birthday, and the babies try to cheer up Angelica.

Penelope is under a lot of stress when she meets Schneider. They have a conversation, and Schneider notices that she doesn't sound like herself. Penelope takes out her aggrevation on him.

Rebecca is extremely happy to have a diagnosis and sings a song all about it.

Charlie takes an "intelligence pill" and claims it has helped him invent a way for spiders to speak to cats. The researchers quickly diffuse this claim and credit the placebo effect for increasing Charlie's self-confidence, arrogance, and perceived intelligence with no actual effects on his intelligence.