Primus is an American first-run syndicated undersea adventure series which aired in 1971–1972. It told the adventures of Carter Primus (Robert Brown). The series was produced by Ivan Tors and one season of 26 episodes was filmed.

A paperback Primus novel by Bradford Street and Ivan Tors was published by Bantam Books in 1971.

Charlton Comics published a short lived Primus comic book (7 issues - February 1972 to October 1972).