User blog comment:Poptropica411/Phineas plus Isabella equals Phineas and Ferb: Across the Second Dimension in Fabulous 2D?/@comment-3347644-20110131052644

Does anyone know where Dan and Swampy mentioned the "further exploration" of Phineas and Isabella's relationship within Season Three? I've noticed loads of references, but can't seem to find the original quotation.