I came to this program from doing an IMDb search on David Tennant. Yes, I came to this from Doctor Who, and yes, I am an unrepentant DT fanboy. But...
I was totally blown away by the talent shown in this early work of Tennant's. Already we can see why he's become such a big hit on stage & TV. Most 22 year old actors just don't have his level of skill. Throughout, as Campbell Bain, he steals the show from it's intended star. At no point did I ever fail to believe him in the character. He embodied it, just as he's done with so many of his other roles.
The story is good, too. A radio station located in an asylum changes the lives of the inmates and the DJ as well. Mostly though, it changes Campbell. At the start he is an uncontrolled manic. As time goes on and he finds an outlet for his mania, he develops a personality, not just a diagnosis.
It's definitely worth hunting down, even if you're not totally mad for David Tennant like me. Just a really good quality Brit TV show.