Theatre-goers looking for some mindless entertainment should steer well clear of this play.

Though relatively short, the intense dialogue of The Unexpected Man challenges the grey matter from beginning to end.

French playwright Yasmina Reza reveals the innermost thoughts of two train passengers on a journey from Paris to Frankfurt, through a series of alternate monologues.

The play's expression of human thought patterns is impressive and the subtle humour running through the piece prevents the material becoming oppressive.

To the Manor Born star Peter Bowles plays Paul Parsky, a famous author struggling to cope with criticism and the imminent marriage of his daughter.

He plays the role expertly, highlighting the often absurd and almost schizophrenic workings of the troubled conscience.

Sian Phillips, as widower Martha, an admirer of Parsky's work, is equally as gripping as she struggles to cope with the loss of a friend and the anticipation of meeting her idol.

The play careers though a dizzying range of subjects, from love, grief and bitterness, through to insomnia, compulsive disorders and even constipation.

The honest and frank dialogue keeps the audience gripped as tension between the characters finally reaches boiling point.

The play is a thought provoking and touching insight into the convolutions of the human mind.

The Unexpected Man runs until tomorrow (Saturday).

Lindsay Holder