Lukunga River constant deposits of sediment. The river drains the Ngaliema commune, Mama Mobutu city and part of Mont-Ngafula, and forms the boundary between Ngaliema and Mont-Ngafule. On its right bank the Lukunga is fed first by the Ikusu River, which has its source at a height of and then by the Mbinza River, which rises at a height of . Before independence, one of the two water treatment plants for Leopoldville, now Kinshasa, was on the Likunga river at Kinsuka in the Ngaliema district. The station had been designed to last for 30 years with normal maintenance, but was in very
A Town Called Mercy looking to give each episode of the series a distinct feel, showrunner Steven Moffat pitched the Wild West theme to writer Toby Whithouse, suggesting that the episode could be about a town terrorised by a robot. Moffat was keen on putting Matt Smith in a Western setting, who he called one of the last people one would expect to replace Clint Eastwood. Whithouse had previously written the "Doctor Who" episodes "School Reunion" (2006), "The Vampires of Venice" (2010), and "The God Complex" (2011). Moffat had been planning for the first five episodes of the series to have "movie marquee" themes.