Waterloo Road Season 5 Episode 16 (Waterloo Road s05e16) airs on Wednesday, May 26th 2010 at 08:00 pm via BBC One.
Here is summary for Waterloo Road Season 5 Episode 16 :

Finn continues to cause problems as he persuades Josh and Amy to join him in smoking a legal. Meanwhile, Tom is furious when he finds out the truth about Josh hallucinates in class.

Few hours after original series aired on TV, online streaming video for Waterloo Road Season 5 Episode 16 usually available on Net and of course, if video available, as soon as possible will show you where you can watch this episode for free.