Can a perfect murder ever be committed, or do human frailties mean we miss tiny details that would inevitably get us caught? That is the premise for ‘Dial M for Murder’, a claustrophobic thriller by Frederick Knott that was most famously bought to life by the genius of Alfred Hitchcock and the beauty of Grace Kelly. A new production by Lucy Bailey is currently playing at The Rep theatre in Birmingham, and I went along to see how the suspense holds up 60 years after it was originally written. The story is many layered. The glamorous Kelly Hotten plays Sheila Wendice, a once adulterous, now devoted wife of ex- tennis…