The Trouble is Ghosts is the 3rd Episode of the 1st Series

Baron Silas Greenback takes Colonel K hostage. Greenback makes the Colonel contact DangerMouse by videophone. As part of Greenback's elaborate ruse, Colonel K tells DangerMouse that Greenback is in jail, and that DangerMouse and Penfold should go on holiday. The Colonel sends DangerMouse and Penfold to a castle in Transylvania. At the castle (owned by Greenback), the villain attempts to terrify the visitors using remote-control robots dressed as ghosts, mummies, et cetera.