Blindpassasjer (Norwegian: Stowaway, literally "blind passenger"; English title: Marco Polo) is a 3 episode Norwegian science fiction television series first aired in 1978. It aired 3 episodes. Directed by Stein Roger-Bull, the story was written by Jon Bing and Tor Åge Bringsværd for which they won the 1978 Riverton Prize.

The show follows the experiences of 5 crew members aboard the starship Marco Polo as they return to Earth from the distant planet Rossum. The crew are awoken from their hibernation deep sleep to find mysterious images on security footage of a mysterious ghostly stowaway. Subsequent investigations reveal that one of the crew has been replaced by a Biomat (a biological robot from Rossum), that has assumed their likeness.

Blindpassasjer is noteworthy for being the first science fiction series to air on Norwegian television.