Michael O'Hara the Fourth

Max can hardly believe his luck: In a retirement home, he has finally found a gang that will let him join! Admittedly, it's the oldest and most wrinkly gang in the world - but that doesn't matter. He's found the best friends a 10-year-old could wish for in the elderly Vera, Horst and Kilian. Especially when, like Max, you're bullied in your new class and need help. But the gang's attempt to improve his school situation backfires. Horst, a former Bundesliga soccer coach, challenges Max's over-ambitious gym teacher Stöhle to a soccer duel: the school team including Laura and Ole against a selection of old geezers plus Max! And then the castle is haunted and a new case begins...

A wealthy student with too much fashion sense, her equally rich friends, and her rival/superior from the school paper work together to solve the case when their teacher goes missing.

When her best friend's father is falsely accused of stealing the town's prized jingle bells, a young amateur sleuth and her friends must find the real thief before Christmas.

Late one night, Billy and Kade Ruckman see their neighbor, Michael Chambers, murder a woman, but Chambers has a story all set to convince their mother Vicky, that it was just a rehearsal scene from an opera. The only ones who can help them find the body in Chambers' house before he moves and gets rid of all evidence, are their friends, Jimmy, Eddie, and J.J., who are determined to find the body before Chambers finds them.

The four young snoopers Tim, Karl, Kloesschen and Gaby by chance discover a hidden cave near an old castle. In it there's a board that seems to describe the way to a legendary sword. They ask their history teacher Schindler about it. He forbids them further actions, but secretly continues investigations with help of two ruthless criminals. But our young heros don't give up on an adventure so fast...

At first, friendgroup TKKG have no idea that something is amiss when “Jugend forscht” winner Kevin behaves strangely during the presentation of his “Mind Machine” - they blame his nervousness and his unexpected termination of the speech on relationship stress with his girlfriend Nadine. But when Nadine disappears without a trace shortly afterwards, like three other children before her, the amateur detectives know that they have to help the police with their investigation.

Susie is an awkward college student who seizes the opportunity to bolster her popularity and her under-the-radar true-crime podcast by attempting to solve the disappearance of a classmate.

The three investigators want to go on a road trip during their vacation, but just as they are about to set off, the phone rings and an unknown caller hands the trio of detectives their latest case: the archaeologists belonging to the secret society Sphinx are carrying out illegal excavations and selling the stolen art treasures. Their next target is the supposedly cursed island of Makatao.

A call for help from gallery owner Mr. Prentice leads the three detectives into a new adventure: his apartment is said to be haunted. When the Carpathian dog, a valuable work of art, is also stolen, events spiral out of control because all the residents have a motive. As the suspects are eliminated one by one, the three detectives find themselves in the middle of their most exciting case yet.

The story is about a boy named Kalle Blomkvist who with his friends solves crimes. But also play the battle between the red rose and the white rose with his rival friends. But everything changes when Kalle Blomkvists friend finds a dead man in a cabin and then must his friends and he find the murdurer.

Three friends find a secret tunnel under the ruins of a church that leads them to the basement of a dilapidated house and, incidentally, a group of counterfeiters.

Before their eventual team-up with Scooby and the gang, bright and optimistic Daphne and whip-smart and analytical Velma are both mystery-solving teens who are best friends but have only met online - until now. Daphne has just transferred to Velma's school, Ridge Valley High, an incredible tech-savvy institute with all the latest gadgets provided by the school's benefactor, tech billionaire Tobias Bloom. And while competition is fierce among the students for a coveted internship at Bloom Innovative, Daphne and Velma dig beyond all the gadgets and tech to investigate what is causing some of the brightest students in school to disappear - only to emerge again in a zombie-fied state.

The Viennese detective children Biggi, Patrick and Luke find a key in dragon form, and their curiosity is aroused. They realize that the sinister Lady Q is interested in opening the legendary moon palace and find the elixir which is believed that promises eternal youth. The Tigers must prevent that Lady Q enters into possession of the priceless liquid.

Henkka Virtanen finds evidence of a possible crime on his way to school. With his friend J.K. Kivimutka, the boys decide to investigate what has happened, because these criminal cases are the responsibility of the detective agency they have set up. When it turns out that mailboxes in the area have disappeared during the night, the detective bureau has already two crimes to solve. A fun and exciting adventure begins, in which the boys also have to face their own fears.

Valo, who recently moved to Raahe, gets bullied. After rescuing an abandoned dog, Valo finds a friend in it, whom she names Roi. Together, the friends end up investigating the mysterious disappearance of a neighbor boy.

Three kids think they see a sea monster in the calm waters of Strawberry Cove, and set out to find what's behind the mystery.