'Entertainment Weekly' reports that Bush frontman Rossdale will appear in the eighth episode, playing the villainous Armand, a wealthy and powerful man "with a hand in nefarious projects all over the world." Fiona (Anwar) asks him for help, but he'll only lend a hand if she helps him with a major heist job.
Fisher, who has a recurring role on 'NCIS' as C.I.A. agent Trent Kort, is set to play an ambitious and ruthless mercenary in the same episode.
Although Rossdale's often best known these days for being Gwen Stefani's husband, he's quietly carved out an acting career with small roles in movies like 'Constantine' and 'Zoolander.'
More recently, he guest-starred on an episode of 'Criminal Minds' in which he played -- what else? -- a rock star with a sinister secret.
'Burn Notice' Season 5 premieres Thu., June 23 at 9PM ET on FX.