Starz has spent five years turning a single crime saga into a self-referential universe, and its latest move betrays how much the studio now thinks like Marvel: recurring characters are connective tissue, not disposable guest stars. Carrying a supporting player across a series finale and into a prequel is the clearest sign yet that Starz runs the world of Power as a bench franchise, where an era can end but the operators keep working.

Leslie Grossman will reprise Florence “Flossie” Siegel — Manhattan’s most prolific madam, all polished society front and old-country mob steel — in Power: Origins, the prequel that picks up after the Power Book III: Raising Kanan finale. As Deadline first reported, Grossman will recur. She only entered this world earlier in 2026, cast for Raising Kanan’s fifth and final season; rather than retire the character alongside the show, Starz is redeploying her.

The continuity is the point. Sascha Penn, Raising Kanan’s showrunner, oversees Origins as well, and the prequel trains its lens on a teenage Ghost (Spence Moore II) and Tommy (Charlie Mann) clawing up New York’s underworld, with MeKai Curtis carrying Kanan Stark forward from the spinoff. Courtney A. Kemp, who created the original Power with Curtis “50 Cent” Jackson, co-wrote the Origins pilot and executive produces through her End of Episode banner; Jackson is among the producers. It is the fourth series in the franchise, after Power Book II: Ghost, Raising Kanan and Power Book IV: Force.

Grossman’s madam is exactly the kind of asset a shared universe hoards: a ready-made power broker with texture, transferable without inventing anyone new. Starz has been doing this on purpose — the same summer it moved Asjha Cooper’s Jarita from Raising Kanan into the prequel — building a repertory company that outlives any single title. The logic only sharpens now that the flagship Power is heading to Netflix, giving Starz every reason to keep the corners of the world it fully controls generating originals of their own.

Raising Kanan is rolling out its final episodes through 2026, and Origins is shooting without a premiere date set, the connective casting arriving before either bookend is fully on screen.

A madam who outlasts the show that introduced her is the tidiest proof of the Power thesis: in this universe nobody really retires, they just get reassigned to an earlier chapter.

Tags: casting, ip-strategy, Leslie Grossman, Power Book III: Raising Kanan, Power: Origins, Starz

Starz runs Power like Marvel, carrying Leslie Grossman’s madam past a finale into ‘Origins’

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