This is a group of construction machines owned by Miss Jenny Packard & Co. The characters were devised by then-producer Phil Fehrle with the intention of being turned into a spin-off series, possibly as a rival to Hit-Entertainment's other successful show and brand Bob the Builder. This spin-off series never materialised, and prior to 2006, The Pack appeared in the episodes "Jack Jumps In" and "A Friend In Need". They have been featured with four new characters in a DVD entitled "On Site with Thomas". In "The Great Discovery", almost all of The Pack are seen. The exceptions are Nelson, Patrick, Isabella and Byron. Jack, Alfie and either Max or Monty also appeared in the series 12 episode, "Percy and the Bandstand". Jack is currently one of five members of the Pack to appear in the CGI series, thus appearing in the 2013 film special, "King of the Railway". However, Jack also appeared with a new look to his face. It was formerly round, but since "King of the Railway" it has been square. Also, Alfie, Oliver, Max and Monty (the other four members of the Pack to appear in the CGI series), returned in the 2015 film special, "Sodor's Legend of the Lost Treasure". Brenda and Darcy, (two new members of The Pack) were introduced in Series 23. Jack is a friendly and enthusiastic front loader who was first seen in the episode 'Jack Jumps In' when he joined the Pack. Despite a couple of accidents, he was able to prove himself when he saved Thomas from disaster, and is now part of the team. Jack is painted red and cream and has the number 11. Jack first appeared in series 6, and has also appeared in series 12, 19, 20, 21, 22, 23 and "The Great Discovery". He also had major supporting roles in "King of the Railway" and "Sodor's Legend of the Lost Treasure". Voice Actors  Alfie is an excavator and a fast worker whose motto is, "More work means more dirt; more dirt means more fun!". He loves working hard, and handles the toughest of jobs with ease. He is painted green and has the number 12 painted in white on his sides and on the back of his cab. In some examples of merchandise Alfie is depicted with freckles, although he evidently doesn't have any in the TV series. Alfie first appeared in series 6, and has also appeared in series 12, 20 and 23.