The eighth season aired in the UK from September 17, 2002 to December 17, 2002. This season was re-shown on BBC in 2003. In the US the eighth season premiered in 2004 on Nick Jr. and was also later re-shown on Noggin in 2004 and PBS Kids Sprout in 2006.
| || Episode|
US title (bottom)
|Bob The Photographer|
|Bob takes some pictures of the town.
|Mr. Bentley's Trains|
|Bob and the gang build a model railway that will be a surprise for Mr. Bentley.
|Wendy's Big Night Out|
|Wendy goes out for a night in the town.
|Muck suddenly goes in a racing mood but gets advice from Skip and Trix.
|Mr. Beasley's Noisy Pipes|
|Mr. Beasley mistakes the noise of his old pipes for a mole stuck under his floorboards which gives him anxiety.
|Lofty's Jungle Fun|
|Lofty imagines what it would be like to be in the jungle.
|Bob gets some secret dance lessons from Mrs. Percival, but he realizes that he can't dance the salsa until an outdoor dance floor is built.
|Molly's Fashion Show|
|Molly hosts a fashion show, but it then goes wrong.
|Spud And The Doves|
|Spud gets some trouble with doves.
|First Aid Molly|
|Molly takes a first aid job at wanting to be a doctor.
|Mr. Bentley: Dog Sitter|
|Mr. Bentley is dog sitting, but the dog escapes.
|Travis Gets Lucky|
|Travis feels as if he needs his lucky horseshoe to plow the fields. However, when he loses it, he finds that he can do his jobs without any lucky horseshoe.
|Scruffty On Guard|
|Scruffty is guarding duty, but he soon gets distracted.
|Bob's gang discovers something amazing.|
| || Special|
US title (bottom)
|"The Knights of Fix-A-Lot"|
"The Knights of Can-A-Lot"
|Bob's father Robert makes a surprise to welcome Bob, Wendy and the gang to help Dr. Mountfinchett repair a castle when Robert pretends to be Bob the Builder and take all the glory. Will the castle be finish and will Bob and his Dad get along?|
- Farmer Pickles
- Mrs. Potts
- Mrs. Broadbent
- Mrs. Percival
- Mr. Fothergill
- Mr. Beasley
- Mr. Bernard Bentley
- Mr. Dixon
- Mr. Ellis
- Angelo Sabatini
- Mrs. Barbara Bentley
- Lennie Lazenby (does not speak)
- Jenny (cameo)
- Bunty Ferguson (mentioned)
- Tony the Hairdresser (Wendy's Big Night Out)
- Mr. Steven (Racing Muck)
- Pam Goody (Molly's Fashion Show)
- Katy (Spud And The Doves)
- Freada and Bertie (Spud And The Doves)
- Timmikins (Mr. Bentley: Dog Sitter)
- Humpty/His Family (Scruffty On Guard)
- Robert (The Knights of Can-A-Lot)
- Dorothy (The Knights of Can-A-Lot)
- Florence Mountfitchet (The Knights of Can-A-Lot)
- The Librarian (The Knights of Can-A-Lot)
- This season marks the first appearances of Tony the Hairdresser, Mr. Steven, Pam Goody, Katy, Freada and Bertie, Timmikins, Humpty/His Family, Robert, Dorothy, Florence Mountfitchet and the Librarian.
- Robert and Dorothy will later appear as recurring characters in Bob the Builder: Project: Build It.