“Fuck world peace,” says Amber Heard, playing Machete’s government fixer who supplies the Latino legend with a new triple-bladed machete and sends him off to Mexico by orders of the US president (played by Charlie Sheen) to stop a madman from blowing up America with a nuke. This is less focused than before and gets bogged down with too many characters and plot-lines, while the set-up sees Rodriguez go over familiar territory riffing on the James Bond spy formula with gags that feel dated, its cheekiness and deranged villains resembling something closer to Austin Powers than anything too subversive. The star-turns are still diverting; Sheen’s president makes a knowing reference to his dad’s more benevolent approach in The West Wing; a face-swapping bounty hunter is used as a device to showcase a succession of famous faces, from Walton Goggins to Cuba Gooding Jr. to Lady Gaga to Antonio Banderas; and Cuban martial artist Marko Zaror plays multiple versions of himself as a cloned heavy giving Machete a hard time. Everyone’s having a laugh, of course, and we’re still in on the joke, even if the series shows signs of fatigue.