I just watched the serial "Robot". It's like "Invasion of the Dinosaurs" with its anti-pollution, pro-environment message. It's interesting to me that the series went from a positive image of environmentalists in "The Green Death" to a negative image of them in the first two named serials. Clifford Jones' community wasn't interested in the destruction of humans to save Earth; they were seeking a means to save both the Earth and humanity. I think both "Robot" and "Invasion of the Dinosaurs", though entertaining, are too similar in nature. The former is saved by the robot, who is depicted sympathically, which is brought to life by better vfx. The dinosaurs were terrible. Poor T. Rex can't get a break from Doctor Who. It is shown to be ridiculously large, as tall as a sauropod in the '70s show and as tall as Big Ben in the '10s.