As per tradition for Nordic Christmas calendars, the series premiered on 1 December 2014 and its first season ran for 24 episodes.

He seems to be unusually interested in the gyro, knows many things about Sofie that he can't possibly know, and is furthermore being chased by two secret agents.

Romeo decides to unravel the mystery and alongside his classmate Holly and Sofie, they travel through the medieval times, the 90s and the future.

Tidsrejsen is written by Poul Berg[4][5] and directed by Kaspar Munk[5] and is based on a concept developed by Nordisk Film TV A/S by Peter Hansen, Adam Neutzsky-Wulff, Philip LaZebnik and Lars Feilberg.

[6] When the main characters travel back in time to 1984, several things appear and/or are referenced from Danish 80's culture, including the use of the song Dig og mig by Dieters Lieder and references to the disk jockey Kim Schumacher.

[13][14] In 2024 the theme song was remade for the second season, once again sung by Caroline Castell and this time also featuring and co-written by Jonah Blacksmith, a danish folk-rock band from Northjutland.

She is reunited in a heartfelt with him at the door of her grandparents' and father's house, after which they decide to destroy the original gyro so that it will not be invented and thus abused in the future.

The episode then cuts to the future of 2044 where Sofie, 30 years older, is still together with Dixie and they have a daughter (called Liv in the book version).

Politiken gave Tidsrejsen 5 out of six hearts, writing that the series is suspenseful and have a good plot.

[13] On average, 1.02 million people watched Tidsrejsen, and had a viewership of about 47%, which made it the most successful Nordic Christmas calendar in Danish television in 11 years.

[15] Tidsrejsen was criticised for its portrayal of the school teacher Ragnar, the only apparently Christian character, as a nasty and condescending type of person, and a fanatic, who wants to prevent scientific progression.