[4] Roles at the NUKU include works by such Estonian authors and playwrights, and as: Ivar Põllu, Paul-Eerik Rummo, Triin Voorel, Andrus Kivirähk, Andres Roosileht, Kalju Kangur, Urmas Lennuk, and Eno Raud.
Roles in productions of international playwrights and authors include those of: Anders Byström, Judy Upton, Gianni Rodari, the Brothers Grimm, Selma Lagerlöf, Jim Jacobs and Warren Casey.
[6] Rask's first feature film debut (credited as Karin Lätsim) was a small role in the 2002 Elmo Nüganen directed war drama Nimed marmortahvlil, which focuses on a group of young men fighting in the 1918–1920 Estonian War of Independence.
In 2007, she appeared in another small role in the Dirk Hoyer directed crime drama Võõras.
In 2008, Rask was a co-presenter of the TV3 musical reality competition series Laulud tähtedega with actor Marko Matvere.
The series follows Rask's character Rita Metsallik as she returns home to the small village on a fictional island where she grew up after living in Tallinn for twenty years to bury her deceased father, only to discover that his death was not an accident.
[8] She has also appeared in a number of film shorts, most notably 2015's drama Tiibadeta piloot, directed by Leeni Linna and pairing Rask with actor Priit Võigemast.