with 8 episodes premiered on January 18, 2011

Holger Nilsson is forced on a raging treasure hunt to find the seven keys to his world-famous relative Mary Diana Graaf's mythical laboratory. To help him, he has the inventor Mortensen and Mary Dia… see more

with 10 episodes premiered on January 8, 2012

Join Holger and Mortensen in search of an ancient treasure - the Gjallarhorn! The journey goes through the Nordic region, from Danish Funen in the south to Svalbard in the north. The secret brother… see more

with 8 episodes premiered on February 2, 2017

A young woman lost her memory after an accident. In the woman's bag is a note with Holger's address.

with 12 episodes premiered on June 12, 2023

Join us on a breathtaking adventure through the world's different climate zones and its natural types. We meet old and new heroes - Mortensen, Esmé, the young Flora and her grandfather Georg Graaf - … see more