This volume contains articles by Kristín M. Jóhannsdóttir, Ingebjørg Tonne, Mai Tungseth and Anne Tamm on perfectivity and telicity in some of the Nordic languages, presented at the 2005 Workshop on Telicity and Perfectivity organized at Cambridge University by Raffaella Folli and Heidi Harley. In the introduction, we summarise the main claims and conclusions of each paper, and briefly discuss the recurring themes and differences in the analyses proposed in the articles included in this special issue of the Nordic Journal of Linguistics.