The series premiered in 1949. Stopped in 1963.

This humoristic strip describes a jovial tram conductor operating at a fictitious line in Copenhagen called Line 0. We follow the nameless conductor on his daily route where he efficiently deals with all sorts of occurring events. A few of the passengers such as certain children are recurring; two of the most often seen are a couple of twin girls who are never lost for words.
The series' title is rather untranslatable but it mainly refers to the route (Linje Nul in Danish) in an affectionate way. The term can also mean an unsignificant man.