DI Humphrey Goodman eagerly awaits the return of Martha, a friend from London. But soon as their romance is put to the test by an untimely murder. Kris Marshall stars.   Thisseries finds DI Humphrey Goodman eagerly awaiting the return of Martha, an old acquaintance from London. But as soon as she arrives on the island, their burgeoning romance is put to the test by an untimely murder. From a cricket club president murdered in the middle of the pitch, to a scientist found dead halfway up a volcano, there are more fiendishly difficult puzzles for the team to tackle. And a seemingly unsolvable case takes Humphrey and the gang to London, in a special two-part story.