One In, All In is an episode in The Sleepover Club. It tells the story of when Charlie makes a presentation at the abandoned orphanage the Blockheads notice that the book that Charlie used dropped out of her bag. That night the girls were suppose to see The Galaxy SuperNova premiere. Charlie and Jason end up locked inside the orphanage for 4 hours and the girls miss the premiere. Jason gets 5 tickets to another movie premiere to give to the SOC's as they missed out on the Galaxy SuperNova one.