Richard Coyle matches her performance as his transformation from the callous con man who initially tries to see how he can turn the post office gig to his advantage to the person who genuinely wants to make it work is very believable. While he might have been initially motivated by a desire to impress Adora and win her heart, we watch as he becomes genuinely attached to the job and the people he works with. Of course there's the added bonus that by making the post office viable again Reacher Gilt will suffer. David Suchet does a beautiful job of making Reacher Gilt the type of character you love to hate. He manages to take his characterization right to the edge of overacting, but never crosses the line. As a result he is delightfully creepy - his smile alone is a thing of absolute beauty/evil guaranteed to make your skin crawl.
The wonderful thing about Going Postal is you don't have to be an aficionado of Terry Pratchett's work to enjoy this adaptation. While the story takes place in the universe of Discworld the author has created, you don't need to have read anything else by him to understand what's going on. Part of that is due to the fact that Pratchett wrote these stories with that in mind, but it's also because the people behind the filming have made sure not to assume their audience know anything about the world it takes place in. As a result even if you've not read any of Pratchett's books you should have no problem understanding what's going on and enjoying this DVD. The acting is superb, its beautifully filmed and its a great story - you really can't ask for anything more from television.