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Bob the Builder is a British stop motion animated children's television series created by Keith Chapman for HIT Entertainment and Hot Animation. In the original series, which aired from 1999 to 2011, Bob appears in a stop motion animated program as a building contractor, specializing in masonry, along with his colleague Wendy, various neighbors, and friends, and their gang of anthropomorphised work-vehicles and equipment. The show is broadcast in many countries but originated from the United Kingdom where Bob was voiced by English actor Neil Morrissey. The show later used CGI animation starting with the spin-off series Ready, Steady, Build!. British proprietors of Bob the Builder and Thomas the Tank Engine sold the enterprise in 2011 to US toy-maker Mattel for $680 million.

In each episode, Bob and his group help with renovations, construction, and repairs and with other projects as needed. The show emphasizes conflict resolution, co-operation, socialization, and various learning skills. Bob's catchphrase is "Can we fix it?", to which the other characters respond with "Yes we can!" This phrase is also the title of the show's theme song, which was a million-selling number one hit in the UK.

In October 2014, Bob the Builder was revamped by Mattel for a new series to be aired on Channel 5's Milkshake! in 2015. Amongst the changes were a complete overhaul of the cast, with Harry Potter actor Lee Ingleby replacing Neil Morrissey as the voice of Bob, and Joanne Froggatt and Blake Harrison also confirmed as the voices of Wendy and Scoop respectively. The setting and appearance of the characters also changed, with Bob and his team moving to the bustling metropolis of Spring City. An American localization of the new series debuted on PBS Kids in November 2015. The changes have been criticized by fans of the original version.

The original series returned to TV in the United States on Qubo on 7 October 2020, but with the original British English dub instead of the dubbed American English one.