Circuit was rather sad because technology had moved on so fast and he seemed not to be much needed. The pre-programmed Androids of Extinctus had left him feeling friendless and useless. More than that too, he felt that what they were doing was just not right. He was a kindly, motivated, robot programmed not to harm anyone. He was not supposed to have a heart but somehow he had ... Circuit just didn't understand that at all !
Circuit sought the company of other dejected, or rejected, manufactured mechanical equipment and can often be found at junk yards desperately trying to make friends.