The Doofenshmirtz Evil Jingle, also known as the Doofenshmirtz Jingle or the Evil Jingle, is a recurring jingle and staple in the Phineas and Ferb TV series, that also occasionally shows up in Milo Murphy's Law as of Season 2, albeit at a much lower rate. It often plays at the first scene Heinz Doofenshmirtz appears in an episode, which is usually at his abode at Doofenshmirtz Evil Incorporated. However it may also be heard elsewhere, to which a lyrical variation plays instead; a theme this jingle is well known for.
This section contains only the variations heard in Milo Murphy's Law. For every variation in Phineas and Ferb, see Evil Jingle over at the Phineas and Ferb Wiki.