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The spy game on the trail slim and thin note perfect

UTV, 11.10pm

For more than 100 years the Brits were undoubtedly the world masters at the international spy game.

In recent decades the Americans and Russians have taken centre stage in Spookland, but the century-old MI5 can still play dirty. Was that ultra- secretive organisation behind an alleged shoot-to-kill policy towards IRA members?

on the trail

UTV, 8pm

John Nettles, who plays lead character Detective Tom Barnaby, is bowing out of the series this year. TV execs insist the show will go on without him, but with no one as yet announced to take his place, who knows?

Tonight, a hated property developer is beheaded at a funfair. Can the ever-resourceful Barnaby crack the case?

slim and thin

RTE1, 8pm

We've reached a stage where the weight is that bit harder to shift and frustrations are beginning to surface. And while some are doing better than others, a healthy rivalry between the leaders just might keep everyone on track.

Tonight, the five leaders up the ante and face down their demons with a heart-pounding challenge at the Curragh.

note perfect

RTE2, 11.25pm

Imelda May's show-stealing performance at this year's Grammy Awards certainly wowed the critics.

Recorded last December in the intimate surroundings of Dingle's St James's Church, tonight's edition features May, The Lost Brothers, The XX, and O Emperor. It is presented by Annie Mac.