When Liina Olmaru found out that she was chosen to play Virve, she was very surprised, because she thought she is too old for this role.
The producers of the series decided that everything should be filmed in real-life places, including in the old Westholm schoolhouse that had to be renovated first.
Most of the scenes were filmed during hot summer days. But because of the fact that the schoolhouse is near a wide street, the windows had to remain shut to avoid the noise of the cars and trolleys getting in.
When the first episode was on the air, the filming of the last episode was not yet completed.
Mait Malmsten was chosen to play Jaak Sirkel, the prototype of Jaan Kross (the author of the novel), because he reminded young Kross the most.