[3] In 1936, at age 51, Holter won the Norwegian part of an international novel competition with the story Skinnbrevet (The Parchment Letter).

The same year, he directed Henrik Ibsen's Ghosts for NRK's Radio Theater.

After a short period of officer training, at age 57 Holter was sent to the Leningrad Front from October 1942 to March 1943 as a war correspondent.

[7] After the war, Holter was convicted of treason and sentenced to three years and three months of forced labor and limited loss of rights.

[8] After serving his sentence, Holter did not return as an actor, but he continued to write and published five books.