Here's Lucy - Season 4 Episode 23
With Viv As a Friend, Who Needs an Enemy?

Viv shows up for a surprise visit, and tells Lucy she may stay in California for a year, but everything goes awry when Harry fires Lucy and hires Viv in her place, making Lucy furious. After a few weeks, Harry cant stand Viv and Viv cant stand Harry. Lucy comes up with a scheme to get Viv to quit, but Kim blabs the whole thing to Viv. In the end, everything ends up back the way it was.