Koutetsu Jeeg (鋼鉄ジーグ Kōtetsu Jīgu), also known as Steel Jeeg in English speaking countries and "El Vengador" (The Avenger) in Spanish speaking ones, is a super robot anime and manga series created by manga artists Nagai Gou and Yasuda Tatsuya.
The anime television series was produced by Toei Animation. It was first broadcast on Japanese TV in 1975.
The 1970s series lasted for 46 episodes. Steel Jeeg also ran as a manga in several children's publications.
A sequel series called Koutetsushin Jeeg (which appears to take place 50 years after the original show) aired on the satellite network WOWOW, beginning April 5, 2007.
