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While seeking to unravel the mystery of his twin brother's disappearance, reclusive puzzle-designer John 'Ludwig' Taylor takes on his twin brother James's identity as DCI on Cambridge's major crimes squad.
Arnold, whose lifestyle on a battered houseboat in Chelsea's Cheyne Walk contrasts sharply with the affluent elite whose crimes he helps solve alongside partner D.C. Priya Shamsie.
Paul 'Wicky' Wickstead, a state-certified cleaning technician, is responsible for the removal of any signs of death from crime scenes.
After a disastrous experience housesitting a high-tech mansion hampered by an inconvenient insect in "Man vs Bee", Trevor Bingley is now looking after a luxurious London penthouse, with another unlikely, un-asked-for companion.
