Peter Davison played the Fifth Doctor on Doctor Who between 1981 and 1984, returning for a special Children In Need episode with David Tennant in November 2007, while Freema Agyeman played companion Martha Jones between 2007 and 2010.

The fifth series of Law & Order: UK begins at 9pm on Sunday 10th July on ITV1, with Peter Davison joining the cast as “down to earth pragmatist” Henry Sharpe, who takes over the job of Director of the CPS.

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