Hot-tempered chef Gordon Ramsay becomes the target of an audacious stunt as Ant and Dec go undercover in Los Angeles, and Little Ant and Dec meet Mr Selfridge star Jeremy Piven. Comedienne Sarah Millican lends her distinctive tones to the voiceover booth and dance troupe Diversity take part in the End of the Show Show. Plus, an unsuspecting member of the public is launched 150ft into the air in new game Place on the Plane and there's a chance for someone in the studio audience to win the items advertised in one of last week's commercial breaks

• Anthony McPartlin
• Declan Donnelly

• Scarlett Johansson
• Ricky Gervais
• Hugh Grant