Rejseholdet (English: "Mobile Unit" [lit. "The Travel Team"]; international title: Unit One) is a Danish television crime drama series, broadcast on DR1, that ran for four series from 1 October 2000 to 1 January 2004. The series, produced by Danmarks Radio, revolves around an elite mobile police task force that travel around Denmark, assisting each local police force solve serious crimes. The series starred Charlotte Fich as DCI Ingrid Dahl, an ambitious detective who is promoted to the role of unit commander seemingly on the basis of being female. The series co-starred Mads Mikkelsen and Lars Brygmann as Sergeants Allan Fischer and Thomas La Cour.

A total of thirty-two episodes aired across four series. Each episode is titled with a reference to an assistancemelding, which roughly translates into English as "Request for Assistance". Each case portrayed in the show was loosely based upon actual sensational crimes such as murders, kidnappings, cross-border sex trafficking and child pornography.