Danish farmer's son Rasmus Berg has been given a costly education in Copenhagen, and when he returns, he speaks Latin to his parents, and Latinises his name as Erasmus Montanus. He wants to "dispute", and goes on to "prove" a number of absurdities, such as that his mother is a rock. He is contrasted to his brother Jacob who is only interested in knowledge which of practical application.
| Actor | Role |
|---|---|
 Niels BorksandStudenten | Studenten |
| MMarie BrinkNille | Nille |
 Per Bentzon GoldschmidtNiels Korporal | Niels Korporal |
 Lone HertzLisbed | Lisbed |
 Buster LarsenPer Degn | Per Degn |
 Ole LarsenJeppe Berg | Jeppe Berg |
 Preben Lerdorff RyeThe Lieutenant | The Lieutenant |
 Poul ReichhardtJesper Ridefoged | Jesper Ridefoged |
 Guri RichterMagdalone | Magdalone |
 Erik WedersøeRasmus Berg | Rasmus Berg |
 Benny HansenJacob | Jacob |
 Ejner FederspielJeronimus | Jeronimus |