The mysterious circuit. (TV: Invasion of the Bane)
The mysterious circuit was a device that Sarah Jane Smith had inside her attic at 13 Bannerman Road. (TV: Invasion of the Bane)
Behind the scenes[]
According to the official SJA website the mysterious circuit came from Shenyang in China. It was found there in the 1880s. The function and the origin was unknown, but the advanced design suggested that it was possibly used by time travellers.[1]