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Our doctors prove that we all have invisible ink in our bodies, and Dr. Xand attends a lice vacuum treatment! In the ER, a patient is seen after hitting her head on an electrical pole, and another has a piece of pencil stuck in her ear. In addition, you will meet quadruplets to discover the differences and similarities between the four girls. They discuss the importance of warm-ups before physical activities. We also see a speech therapy session with Milly. Finally, you'll get the answer to the question, 'What do you do if you accidentally get hit in the eye?'.