74 / Riddle of the Past Kim, Franzi, and Marie find an injured boy at the swimming lake. Soon it becomes clear that he doesn't know who he is or where he comes from. He plays the piano virtuously, speaks very eloquently, and greets the girls with a kiss on the hand. Could he be a noble time traveler from the 18th century? The three detectives have little time to solve the riddle of the past.

76 / False Fame It starts with mean comments under the videos of the successful video blogger Supergirl - and then the attacks on Lena, her real name, just keep coming. Who is jealous of her success? Fortunately, Lena finds support in her community - and the number of clicks and followers is steadily increasing. The three !!! want to find out who is behind the nasty attacks. But something doesn't seem right here...

77 / Attention, Thief Signs! In the East Quarter, where Marie also lives, there has been a burglary. Apparently, apartment break-ins have been on the rise lately. The three !!! begin their investigation and discover mysterious chalk markings on fences and house walls during their neighborhood inquiries. What could this mean? And is Marie's family's villa also in danger?.