|Series 02, Episode 04|
|Air Date|| Welsh: September 27, 1988|
English: September 22, 1988
Australian: April 16th, 1991
|Previous||Thief In PontyPandy|
|Next||Safe with Sam|
Chemistry Set is the fourth episode of Series 2.
Norman's dream of making the pongiest stink bomb in the world backfires when Dilys walks into the laboratory.
- Fireman Sam
- Elvis Cridlington
- Station Officer Steele
- Sarah and James
- Dilys Price
- Norman Price
- Trevor Evans
- Bella Lasagne
- Morgan (mentioned)
- Stock footage from Flat Tyre is used.
- The Welsh title is called, "The Scientist".
Home Video Releases
- Fireman Sam 3 - Sam's Day Off
- The Very Best of Fireman Sam
- Fireman Sam - Treasure Hunt
- Fireman Sam - 2 on 1 - Tales from Pontypandy
- Fireman Sam - Action Stations