Inviting everyone and anyone to your open-air show can be a dangerous thing.

Last year, Incisor Productions found this out for themselves when a star-struck dog decided to make its theatrical debut in the middle of their production.

"Someone let their dog off the lead and it ran on to the set and ate the muffins during The Importance Of Being Earnest," says sarah Mann, producer of their latest venture Blithe Spirit. "We just let it get on with it and carried on."

This year, the Brighton group return unfazed with Coward's escapist comedy Blithe Spirit.

Author and socialite Charles Condomine decides to hold a seance for research into his new book on the occult, not realising this spells the beginning of the end of his marriage to new wife Ruth.

The wildly eccentric Madame Arcati inadvertently conjures up the ghost of Charles' deceased first wife Elvira, who then begins a relentless campaign to reclaim her husband.

"She's completely dotty, a bit mad," says Mann of Arcati. "Charles and Ruth presume she's a charlatan but it turns out she's not. There's a lot of comedy with her because only Charles and the audience can see her and she plays tricks on Ruth."

Coward based the eccentric Arcati on his friend and fellow playwright Clemence Dane who he used to meet in the White Room pub (now the Amsterdam) in Brighton. Written in 1941, Blithe Spirit remained the longest-running comedy in British theatre for the next three decades.

Incisor have stayed true to Coward's original play, setting it in the Forties. But instead of acting the action out on a stage, the play unfolds in a living room in the middle of St Ann's Well Gardens.

"It's been very interesting trying to make it work outside. There are a few special effects but they're very old-fashioned. There's no theatre, no ropes and pulleys, so we use sticks to poke things."

Expect crystal balls, dancing branches and flying ornaments, says Mann and dogs, children and picnics are still all welcome.

Starts at 7pm, tickets cost £5-£10. Call 01273 292711