Thirty Cases of Major Zeman (Třicet případů majora Zemana) is a Czechoslovak action-drama television show intended as a political propaganda to support the official image and attitude of the Communist Party of Czechoslovakia. The series was filmed in the 1970s. Most of the episodes are inspired by real criminal cases. The series follows the life of police investigator Jan Zeman during his career from 1945 to 1973.