Horrid Henry Season 5 Episode 21 Horrid Henry: My So Called Life / Horrid Henry and the Terrific Teenager Episode Title: Horrid Henry: My So Called Life / Horrid Henry and the Terrific Teenager Episode Description: Horrid Henry: My So Called Life:Margaret unveils her multiple YouGroove channels, one of which is poking fun at Henry. He then tries to convince Margaret to take them down. Horrid Henry and the Terrific Teenager:Peter goes to Great-Aunt Greta's house for the weekend, to which she is still concerned that Peter is a teenager.