Helena Zengel made her full-length film debut in the TV crime movie
Mörderische Hitze (2014). She plays the very small role of the 5-year-old Johanna, daughter of the main protagonists Christian and Irene Richter in the narrative level of the past. Filmed in the summer of 2013 on original locations in eastern Germany, the crime drama about a marriage tragedy won six German Television Awards.