Nick Jonas guest stars as a young computer hacker in tonights episode of Hawaii Five-0.

• 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. Joining tgem are Ant and Dec, who will guide viewers through all the acts as only they can.

• Hawaii Five-0, M-Net, 20.30

McGarrett and Grover must work together to protect national security after they are tasked by the governor to serve a warrant to a young computer hacker.

• Nowhere Boys, Vuzu, 22.00

Four mismatched year ten students, Andy, Felix, Jake and Sam are grouped together for an orienteering exercise on the outskirts of their hometown. After taking a short cut and getting lost, they survive a terrifying night in the forest. When they finally return home the next morning, they find things aren’t quite as they left them.

• Secret Societies of Hollywood, E! Entertainment, 22.00

Beyond the red carpet lies a forbidden Hollywood that only the rich and famous know about – until now. This is a shocking glimpse into the private lives of the stars as we reveal the lies and scandals celebrities try to cover up. From agents and managers to attorneys and private investigators, discover how the glitterati keep a lid on their indiscretions. With exclusive footage, first-hand accounts and a panel of experts, we expose the seedy underbelly of the entertainment industry.