There may be 104 days of summer vacation, but there are more than 200 episodes ofPhineas and Ferb.

Early on, every episode ofPhineas and Ferbfollowed a strict formula.

Which isn’t a lot, but it’s weird that it happened twice, right?"

PHINEAS AND FERB

Everett Collection

Where, then, should a neophyte start?

(One-hour specials were off-limits because it seemed unfair to compare 11-minute installments to super-size ones.)

“if you don’t agree.

“Hail Doofania!”

was one of the show’s earliest attempts at this.

Of course, it’s much more lighthearted than that sounds.

“Dude, We’re Gettin' the Band Back Together!”

“What Do It Do?”

gives her one, to great effect.

(She remains unaware that the boys are meanwhile reverse-engineering the rig to determine what it does.)

(How pleasantly unexpected it is to hear a line like “Dad, what are you doing here?

This isn’t your weekend” said casually on a Disney Channel show.)

Case in point: “Let’s Take a Quiz” is 11 minutes of almost nonstop hilarity.

(“Defenestrate.”

“Defenestration.")

Also, keep your ears peeled for a vocal cameo from Tisdale’sHigh School MusicalcostarCorbin Bleu.

What puts “Thaddeus and Thor” above much of the rest is, once again, Doofenshmirtz.

Says Doof with a sigh, “You know, on paper… this was the outcome too.”

“Rollercoaster: The Musical!”

“Rollercoaster: The Musical!”