Riddler (Adam West Batman)

The Riddler is one of the recurring villains in the 1960s Batman TV series.

He is portrayed by Frank Gorshin

The Riddler (1960s Batman TV Show)
The Riddler is the tertiary antagonist in the 1960s Batman TV series. The popular television series was inspired by the first Silver Age appreance of The Riddler, with the premiere episode being an adapatation of Batman #171. Gorshin's portrayal of the character was loosely inspired by Richard Hidmark's portrayal of gangster Tommy Udo from the film Kiss of Death.

Trivia
Gorshin was a fan of the Batman comic books since childhood and he said he liked The Riddler as a character.