IF something's been written by Agatha Christie, there's a pretty safe bet it's going to be good.

The fact that The Mousetrap has been running for an incredible 70 years ­— and is the world's longest running play – speaks volumes about the popularity of this particular play, so I was intrigued to finally see it at Lighthouse, Poole as part of its 70th Anniversary Tour.

It is actually the third time the classic saga has visited the venue, with this latest set of dates part of 70 productions being staged in countries across the glob, in as many languages as possible, as part of the anniversary season.

The stage is set as we meet a clutch of diverse characters all arriving during a snow storm for a stay at a country guest house, hot on the heels of a murder in London ­— believed to have been committed by a person wearing a dark coat, light scarf and felt hat. The exact outfit, coincidentally, that all the characters are first seen in.

As the weather worsens, a policeman arrives and shares his belief that the killer is in their midst, with a second murder imminent.

What follows is a classic whodunnit, with some trademark Christie humour thrown in to lighten the mood. Being set in the 1950s, I did wonder whether some of the dialogue we chuckled at was actually supposed to be humorous when it was first written.

We discover each of the cast has something to hide, with the audience left to guess and second guess throughout the two-hour performance, which of them is connected to the first victim, who is at risk and which of them is capable of murder.

Being a part of the group of theatregoers who have seen the play, I'm now one of those trusted with the truth, - as requested by the cast during the curtain call – so no spoilers, only to say I began to have my suspicions part way through act two.

The Mousetrap is at Lighthouse, Poole, until Saturday, May 4 – see if you can solve this world famous mystery, which has had millions of theatregoers on the edge of their seats for the last 70 years.