|An Inspector Calls|
|Series 15, Episode 12|
|Air Date||October 3rd, 2009 (UK)|
|Previous||Splasher's Two Stops|
|Next||Scratch's Hidden Treasures|
An Inspector Calls is the series finale of the sixteenth season and Project: Build It.
Mr. Carruthers, the chief building inspector, comes to inspect Bob's team's work.
- Mr. Bernard Bentley
- Mr. Carruthers
- Spud (flashback)
- Travis (flashback; does not speak)
- Benny (flashback; does not speak)
- Robert (flashback; does not speak)
- Dorothy (flashback; does not speak)
- Angelo Sabatini (flashback; does not speak)
- Stock footage from Sir Muck, Muck's Convoy, Dizzy the Detective, Roley Brings the House Down, Two Scoops and Bob's Big Idea is used.
- This is the last episode to use Stop Motion Animation and also the latest appearance of Sunflower Valley.
- This episode was the final time Wendy wears the red screwdriver she wore between Seasons 2-16.