Complex sentence: It received its Broadway debut on November 6,2003 when the Manhattan Theatre Club pproduced it with a cast featuring Robert Sean Leonard as Seavering and Cantone reprising his role as Gidger.
Split into simpler sentences: It received its Broadway debut on November 6,2003 when the Manhattan Theatre Club performed it. It featured Robert Sean Leonard as Seavering and Cantone reprising his role as Gidger.