Undermind is a science fiction television drama produced by ABC Weekend Television in 1965. It ran for eleven episodes of sixty minutes each. It starred Rosemary Nicols, Jeremy Wilkin and Denis Quilley.

The series was devised by Shoestring and Bergerac creator Robert Banks Stewart, who also went on to write for Doctor Who. Several other writers known for their work on Who also contributed scripts: David Whitaker, Bill Strutton and Robert Holmes.