TV Highlights Friday
Boyzone at 20: No Matter What
Danni Minogue introduces this one-off show to celebrate Boyzone's 20th anniversary in showbusiness. Ronan Keating, Shane Lynch, Keith Duffy and Mikey Graham will perform some of their best loved songs, and Spice Girl Melanic C joins them for a performance of their big hit, 'No Matter What'.Live Racing From Cheltenham
Channel 4, 1.30pm
Nick Luck presents coverage of four races at day one of The International meeting at Cheltenham. With analysis from Jim McGrath, Simon Holt (right), Rishi Persad, Mick Fitzgerald and Tanya Stevenson.The Graham Norton Show
Ben Stiller (right) joins Graham this week to discuss his remake of 'The Secret Life of Walter Mitty', and Martin Freeman will also be along to talk about the new 'Hobbit' film, and the return of hit TV show 'Sherlock'.Marvel's Agents of SHIELD
Channel 4, 8.00pm
In this cliff-hanger episode of the series, Coulson (Clark Gregg, right) takes the war to Centipede, and brings with him super-soldier Mike. And as they get closer to the truth, an unexpected twist threatens the whole team.