Emily Swallow joins the cast of The Mentalist as Kim Fischer.

• Britain’s Got Talent, M-Net, 18.30

Judges Simon Cowell, Amanda Holden, Alesha Dixon and David Walliams are back to unearth the most entertaining and original talent around. Joining them are the award-winning Ant and Dec, who will guide viewers through all the acts as only they can.

• True CSI, Discovery ID, 19.00

Combining the thrill of mystery with the visceral experience of true crime drama, this series explores real-life murder cases that captured the world’s attention. Each episode returns to the scene of a crime to allow viewers to examine all the evidence. Featuring re-enactments, statements from witnesses and the testimonies of detectives, this show presents competing versions of what may have happened, and portrays events from different perspectives as new evidence comes to light.

• The Mentalist, M-Net, 20.30

Two years after the Red John case was put to rest, Jane’s newfound peace is interrupted by a job offer that could change everything for him. Emily Swallow joins the cast as Kim Fischer.

• Top 20: Football Sex Scandals, Trace Sports, 21.00

Travelling the world, a seemingly endless abundance of cash, adoring fans and the skills that mere mortals can only dream of: you’d think that football stars would be satisfied with their lot, but apparently not! Tabloids are filled with stories of mischief, but which superstars are the biggest culprits, and which ones have been involved in the biggest sex scandals? It’s not just the English media that enjoy a good scandal – these stories come from across the world. Lap up the controversy in this Top 20 countdown.