The title "Täckmanteln" translates in English to "Undercover".
When Charlotte Fich's character, Henrietta, replies to Wallander "I love to travel" (da. "Jeg elsker at rejse"), it could be a nudge to her lead part as Ingrid Dahl on the Danish TV series Unit One (2000) (da. "Rejseholdet") about a mobile special cases police unit.