Definite or indefinite

Always looking for an opportunity to raise the level of culture in the house, and noticing that The Guardian were offering tickets, I booked to see A Government Inspector at Harrogate Theatre. Part of Harrogate theatre's All Points North Season.
Now, as you all know, The Government Inspector was a satirical play by the Ukrainian born Nikolai Gogol. Based upon an anecdote allegedly recounted to Gogol by Pushkin, the play is a comedy of errors, satirizing human greed, stupidity, and the extensive political corruption of Imperial Russia (please keep up). So far so good.
The seats were relatively inexpensive and I managed to get my favourite seats with plenty of leg room and a quick exit to the bar, just in case. The small mistake that I made was in not noticing that there is a difference between 'A Government Inspector' and 'The Government Inspector.' The actual difference being that one is the original play and the other isn't. It's an adaptation placing the action in a northern provincial town. Guess which one we went to see?
Now, I have no objection to farce, this farce was well produced and directed and well acted but lacked some of the subtlety and gravitas that I'd expected. After about 30 minutes I knew that Jan's cultural levels were not going to be improved. Nor was I alone in my disappointment. It raised barely a titter because I suspect that like me the audience was expecting something just a wee bit different.
Ah well.