After twelve years of service in Vienna, police officer Martin (Michael Steinocher) returns to the Waldviertel. Back then his girlfriend Mona (Henrietta Rauth) disappeared without a trace and he thought he had overcome the loss. But back in the familiar surroundings of his first great love, everything comes back to him. A few days after he started work, Fanny (Susi Stach) was found dead in a pond. She was the servant of a lady of the castle. Surprisingly, it's murder.

Today it's going to be musical with "Klangio". The two founders, Alexander Lüngen and Sebastian Murgul, present an innovative app that uses artificial intelligence to turn music played into written notes. During testing, investor Janna Ensthaler proves her talent on the guitar. Did the founders hit exactly the right tone with their app?

The 3 million euro week is entering its fourth round. On three consecutive evenings, the candidates at Günther Jauch's fight for entry into the final show on the fourth evening and again for the chance to win the highest prize in the history of "Who wants to be a millionaire?" of three million euros.

"How are you doing with buses and trains?" Sven Plöger asked his audience and thousands shared their experiences in the ARD crowd science campaign. These entries were evaluated by a team of scientists. In the documentary, Sven Plöger, a staunch train traveler, is now traveling with passengers who took part in the campaign and asks them: "What needs to change so that more people use public transport?"

100 candidates are sent into the game to win 99,000 euros. The game show is looking for the greatest all-round talent: anyone who manages not to come last once in 98 rounds can win 99 - 99,000 euros in the final duel game. The candidates master the way there with a mixture of skill, sportiness and cleverness.