The fifth series (1998), also first released directly to video before its TV airings on Cartoon Network, was a radical shift, as all episodes were written by Allcroft and Mitton with no further stories being adapted from the "Railway Series". This series saw the introduction of new characters, such as Cranky, The Horrid Lorries and Old Slow Coach. It also focused on more dramatic and action-oriented plot-lines, with more severe accidents, than in the earlier series. After series 5, Angus Wright stepped down as executive producer. It was also the final series broadcast on Cartoon Network, as Nickelodeon UK would eventually acquire the broadcast rights to the show for it to air on their newly created Nick Jr. channel in 1999. CN continued to air older series until their broadcast rights fully expired in 2001.