Although not "filmed" as such on the Underground, there have been two animated children's television series set on and around it. The first was "Tube Mice", a 1988 series concerning the adventures of a group of mice living on the Underground. The second was the 2006 series "Underground Ernie", set on a fantasy version of the network and featuring a friendly Underground supervisor and his talking trains. There was also a 2004 animated short, also called "Tube Mice", about mice who keep the Underground in order.