The Real Housewives of Beverly Hills for a little diamond-studded catch-up this week, and ET has your exclusive sneak peek.Lisa and Erika pick Eileen up on their way to a party at Kyle Richards' house, and their car ride is the perfect time for Lisa and Erika to fill in their newly brunette (it's for a movie role) friend on the drama going down with Denise Richards. While Eileen and Denise never appeared on RHOBH at the same time, they do seem to know each other from Hollywood circles.