Swamp Oil 0.500

"Swamp Oil 0.500" is the third episode of Season 6. It's production code is PE0050 and it featured the return of Thaddeus and his brother, Thor. In the episode, Phineas, Ferb, Thaddeus, and Thor compete in a go kart race.

Synopsis
Thaddeus and Thor visit again and decide to challenge Phineas and Ferb to the upcoming Swamp oil 500, to see who is better at building a race car. However, all the spots for the race are filled, so instead a go kart race is scheduled. Buford and Baljeet are the judges of this race, and Buford keeps disagreeing with Baljeet's judgements, so Isabella and Django are hired as judges. Phineas and Ferb create the superior cart, all Thaddeus and Thor's cart does is burn the judges to a crisp. P&F win and T&T are sent to jail.

Also, Perry combats Doofenshmirtz and attempts to destroy an evil portable ray gun. The engine falls out, helping Phineas and Ferb make their go kart.

Running Gags
I know what we're going to do today:

Phineas: But if the races are closed, how can we- wait! Ferb, I know what we're going to do today!

Ferb's Line:

Ferb: How can we aqcuire a turbo drift engine in 20 minutes?

Evil Jingle:

Doofenshmirtz Evil Incorporated!

Trivia/Goofs/References
This episode was well-recieved. It was rated 7.5 on a fansite.
 * This is Django's first appearance in season 6, but he only has one other appearance: Isabella's Hannukah Snack.
 * Thaddeus and Thor's sister does not appear. This is explained in a later episode.
 * There are references to the season one episode The Fast And The Phineas.
 * ==Reception==