Complex sentence: Mark Goodson/Bill Todman Productions (now owned by FremantleMedia) handled production (Goodson solo on "CC"), however NBC retains the rights to these series and any future revivals.
Split into simpler sentences: Mark Goodson/Bill Todman Productions (now owned by FremantleMedia) handled production (Goodson solo on "CC"). However, NBC retains the rights to these series and any future revivals.