Secret task, anyone?

No sooner had the four brand spanking new housemates burst into the House, than Big Brother was summoning them to the Diary Room in an ominous voice. Scary!

Perched on the plush new silver Diary Room chair, the four said nervous hellos to Big Brother, before being told that they were going to be involved in a mission.

"Lisa and Mario, you are a couple," Big Brother informed the pair, just in case they didn't already know. He then dropped a bombshell and announced, "Your romance is about to end."

"What?" the pair shrieked. "Noooo!"

Big Brother then revealed his evil plan -- that Mario and Stephanie had to pretend to be a couple, and Lisa and Luke had to do their best to prevent any other housemates from finding out the truth.

If the four succeed in their task, they'll be exempt from nomination next week - but if they fail, they'll all be up for the chop!

Mario and Stephanie quickly agreed to get to know each other. "We auditioned together in Manchester," the pair decided, before agreeing to cut Mario's age down from 43 to 32, and bump up Stephanie's from 19 to 22. "We don't live together," Mario said firmly. "I live in Widnes. What do you do?"

"I'm still at school!" Stephanie giggled. "I've just done me A levels." "Say you're at college," advised Luke wisely. "We've been together 8 months," Mario improvised, as Lisa stood by, keeping an eye on her fella.

Wonder what they're going to do about sleeping arrangements?