'The Breakthrough' is a gripping Swedish crime drama series directed by Lisa Siwe, based on the true story of the 2004 double homicide in Linköping, Sweden. The series follows Detective John Sundin, portrayed by Peter Eggers, as he collaborates with genealogist Per to solve the case that remained unsolved for 16 years. Their groundbreaking use of forensic genetic genealogy leads to a historic resolution, marking the first murder in Europe solved using this technique. The show delves into the personal and professional challenges faced during the investigation, offering a compelling narrative that keeps viewers on the edge of their seats.