- Angeline Andrews
- Â Mrs. Nitrogen 4 episodes, 1999
- Jamie Muffet
- Â Agent Gold 4 episodes, 1999
- Rosemary Alldred
- Â Chlorine 4 episodes, 1999
- Apostolis Papgeorgiou
- Â Carbon 4 episodes, 1999
- Victoria Meisler
- Â Fluorine 4 episodes, 1999
- Machteld van der Gaag
- Â Oxygen 4 episodes, 1999
- Jamie Muffett
- Â Agent Gold 3 episodes, 1999
- Adrian Mulraney
- Â Caesium 1 episode, 1999
- Pierre Cabanon
- Â Croupier 1 episode, 1999
- James Miles
- Â Solvent Water 1 episode
- Rob Lloyd
- Â Bromine 1 episode, 1999
- Callum Gallagher
- Â Ethanol 1 episode, 1999
- Jon Brydon
- Â Agent Silver 1 episode, 1999