The fifteenth series premiered in the UK between September 19 to October 9, 2007 on CBeebies. In the US, the fifteenth series premiered between September 13 to November 1, 2008 on PBS and reran on the channel until 2015.
Episodes
| Screenshot | Episode Number |
UK title (top) US title (bottom) |
Written by | Original air date |
|---|---|---|---|---|
 |
183 (1) | The House That Lofty Built | Simon Nicholson Marc Seal |
09/19/2007 |
| Bob moves his mobile home to Bobland Bay and Lofty turns the machine shelter into a makeshift house. | ||||
 |
184 (2) | Bob's Big Idea | Marc Seal | 09/20/2007 |
| Bob is having trouble designing his dream house in Sunflower Valley. | ||||
 |
185 (3) | Roley Brings the House Down | Marc Seal | 09/21/2007 |
| Roley and Muck play in the mud, but an accident leads to the old machine shelter being knocked down. | ||||
 |
186 (4) | Muck's Machine Wash | Dave Ingham | 09/24/2007 |
| Muck is unhappy when he finds that Bob has built a machine to clean all the vehicles, as he knows it will clean all the muck off him. | ||||
 |
187 (5) | Lofty's Comet | Simon Nicholson | 09/25/2007 |
| Bob, his dad and Lofty build an observatory so everyone can watch a comet pass over the valley. | ||||
 |
188 (6) | Lofty the Lifeguard | Laura Beaumont Paul Larson |
09/26/2007 |
| Lofty rescues a famous film director, Oscar Flicks, who gets into trouble at sea. | ||||
 |
189 (7) | Go, Mr. Bentley, Go | Simon Nicholson | 09/28/2007 |
| Mr. Bentley takes Scrambler on as his personal trainer when Bob and the team build an exercise park at Bobland Bay. | ||||
 |
190 (8) | Star Struck Spud | Laura Beaumont Paul Larson |
09/27/2007 |
| Bob and the gang build a drive-in cinema, before Oscar Flicks' sea monster movie shot in Bobland Bay is finally shown. | ||||
 |
191 (9) | Tumbler and the Skate Park | Marc Seal | 10/01/2007 |
| Tumbler the cement mixer arrives in the valley to help build the Bobland Bay skate park. But his big and booming ways cause trouble. Will he learn that big doesn't always mean best? | ||||
 |
192 (10) | Fantastic Flex | Marc Seal | 10/02/2007 |
| The lens needs replacing on the lighthouse, so Flex comes to help. | ||||
 |
193 (11) | Packer's Trailer Trouble | Louise Kramskoy | 10/03/2007 |
| Bob and the machines build an ice-cream parlor in Bobland Bay, but Packer gets his deliveries all muddled up. | ||||
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194 (12) | Scoop's Best Team Ever | Simon Nicholson | 10/04/2007 |
| Scoop worries that Benny will replace him as Bob's number one machine. | ||||
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195 (13) | Tumbler's Perfect Promenade | Dave Ingham | 10/08/2007 |
| Tumbler wants the promenade at the Bobland Bay Hotel to be unique to Bobland Bay. | ||||
 |
196 (14) | Spud and the Hotel | Laura Beaumont Paul Larson |
10/05/2007 |
| The first guests arrive at the Bobland Bay Hotel and Spud decides to help out by trying his hand at every job. | ||||
 |
197 (15) | Clean As A Whistle Bristle | Dave Ingham | 10/09/2007 |
| Items go missing soon after Bristle the street cleaner arrives. | ||||
Characters
- Bob
- Wendy
- Spud
- Robert
- Dorothy
- Scoop
- Muck
- Dizzy
- Roley
- Lofty
- Benny
- Scrambler
- Travis
- Packer
- Dodger
- Sumsy
- Spud
- Scruffty
- Mrs. Bentley
- Mr. Bentley
- Mr. Beasley
- Mr. Sabatini
- Meg
- Piper
- Ella
- Sunny
- Farmer Pickles (does not speak)
- Sophia Sabatini (cameo)
- Chip Chipper (mentioned)
- Marjorie (mentioned)
Characters Introduced
- Tumbler
- Flex
- Bristle
- Oscar Flicks
- Pablo Sabatini
- Llewela
- Mr. Bell
- Sam
- Dickie Chester
- Jimmy
- Jimmy's Parents
- Bruce
- Brenda
Trivia
- This is the first, last and only series of some things:
- The first series with Marc Silk voicing Bob, Lorelei King voicing Roley and Emma Tate voicing Dizzy in the US.
- The first series where construction on Bobland Bay begins.
- The first series presented by WNET on PBS airings.
- The first series in where Saffron, Pilchard, Marjorie, Chip Chipper, Annie and Sprat do not appear since their introductions, but Chip Chipper was mentioned in one episode.
- The final series to have Richard Briers and June Whitfield as part of the original UK voice cast, prior to their deaths in 2013 and 2018 respectively.
- The only series of Project: Build It to date with all episodes released on US DVDs.
- The only series where Farmer Pickles and Sophia Sabatini do not speak in any episodes.
- The only series where Sunny appears without Saffron and the latter does not appear in any episodes.
- The third series where Pilchard doesn't appear; albeit still in the intro. The second was Series 12 and the first Series 11.
- This series was produced in around late 2006 to early 2007 according to the UK credits.
| Original Series |
|---|
|
Series 1 • Series 2 • Series 3 • Series 4 • Series 5 • Series 6 • Series 7 • Series 8 • Series 9 |
| Project: Build It |
|
Series 10 • Series 11 • Series 12 • Series 13 • Series 14 • Series 15 • Series 16 |
| Ready, Steady, Build! |