The builder appears in the episode "The Musician" in season two of the Land of the Lost (1974 TV series).
Will Marshall, Rick Marshall, Holly Marshall, and Cha-Ka find a temple with Human-looking hand prints. Holly finds a Red ring and Cha-Ka messes with a table that lights up. Soon after they leave strange red shapes appear in the sky that connect with the table Cha-Ka messed with. A strange figure cloaked in a red light came behind them. A voice in the air called out for Holly, Cha-Ka, Ta and Sa.
They decided to take Holly back to the temple to get the ring off. It was stuck and it drained the energy out of her. On the way there the glowing red figure (the builder) told Will and Rick it was not their time and they were rendered unconscious. Ta and Sa ran away and the voice in the wind told them they failed. Cha-Ka tried to get Holly back to the temple but he could not carry her. The builder then shrunk and turned into a small human-looking child who took the ring off Holly and put it on Cha-Ka and told him it was his time.
Later in the cave Will and Rick wondered who's time it was. Cha-Ka was then shown playing a flute perfectly and in the beginning of the episode he was terrible. The builder had given him the gift of genius and not long after he could walk and run upright and talk. When Holly had the ring on she was in a trance and when Rick asked her what The Builder built she spread her arms apart pointing to the valley hinting that the builder built the land of the lost.
- The Musician