After locating and retrieving the Amulet of Juatchadoon, adventuring archaeologist duo Ohio Flynn (Phineas Flynn) and Rhode Island Fletcher (Ferb Fletcher) set off to Central America to help Damsel in Distress Isabella find the Lost Temple of Juatchadoon and her missing mother. However, Dr. Doofenshmirtz has other plans for the amulet - to awaken the evil corn colossus to give him the power to destroy the world.
- Adventurer Archaeologist: Ohio Flynn, Rhode Island Fletcher, Isabella and New Hampshire Garcia-Shapiro. Doofenshmirtz is an Evil Counterpart to them.
- Big Entrance:
- Doofenshmirtz has a little light show as he stands atop a descending pillar with banners with the letter "D" unrolling behind him when he captures the group at the Lost Temple.
- Perry completely one-ups Doofenshmirtz's entrance, blowing a hole into the temple room and walking in with a troupe of backup dancers as they sing his theme song, and then he frees everyone without missing a single dance cue.
- Card-Carrying Villain: Parodied. Upon being called a dirty double crosser, Isabella presents a card with "dirty double crosser" written on it. Subverted because she only double-crosses Ohio and Rhode Island because her mother was being held hostage.
- Da Editor: Linda is a newspaper editor for the Daily Tableaux in this story.
- Damsel in Distress: Isabella's 1914 counterpart is a certified damsel in distress.
- Elseworld: Transplants the Phineas cast into the year 1914 as Indiana Jones expies.
- Global Ignorance: Major Monogram thinks he's in Egypt because there are pyramids nearby.
- Glory Seeker: Though Ohio is similar to Phineas in many ways, one thing sets him apart: He's opportunistic and seeks fortune and glory.Waiter (Lawrence): Hello gents, what's your fancy?Ohio: Well, fame, glory, money and the preservation of semi-mystical historical treasures, but we'll settle for hot fudge Sundays.
- I Have Your Wife: Doofenshmirtz holds Isabella's mother hostage to force her to betray Ohio and Rhode Island.
- Intrepid Reporter: Candace is a journalist who follows Ohio and Rhode Island for her scoops.
- Killed Off for Real: Doofenshmirtz and Perry's 1914 counterparts, still busy arguing, don't appear to make it out of the Lost Temple before it collapses on top of them.
- Left the Background Music On: Perry's theme in his Big Entrance is supplied by a troupe of backup singers.
- My Card: Isabella has a card for each thing she does for a living.
- Nice Hat: Almost every main character is wearing a fedora. Ironically enough, Perry does not wear one until the end due to Monogram requesting that agents in the region wear a fez (due to believing they were in Egypt because of the presence of pyramids), though he does reveal that he had a fedora under his fez the whole time.
- Raiders of the Lost Parody
- A Rare Sentence: When Dr. Doofenshmirtz sicks the Corn Colossus on Perry the Platypus and his backup singers.Ohio Flynn: We've got to lead that corn colossus away from those back up singers!
Isabella: OMG, coolest sentence ever! Somebody write that down.
- Running Gag: Perry wearing a fez despite not being in Egypt is pointed out multiple times.
- Stating the Simple Solution: When Ohio Flynn is trying to think of a way to get a key out of a glass case, Isabella suggest "Or, we could hit it with a rock!" Later in the episode, Ohio suggests the same idea to destroy the amulet that controls the Corn Colossus.
- Whole Plot Reference: The episode as a whole is one to Indiana Jones.
- The title is a reference to Indiana Jones and the Temple of Doom.
- Phineas, Ferb and Vivian (Isabella's mother)'s 1914 counterparts are archaeologists who have an American state as their first name (Ohio, Rhode Island and New Hampshire respectively).
- Upon entering the temple, the gang is chased by a rolling boulder.
- Doofenshmirtz is dressed similarly to René Belloq, and intercepts Ohio and Rhode Island at the beginning in a manner similar to how Belloq intercepts Indy at the beginning of Raiders.
- Isabella betraying Ohio and Rhode Island is a reference to how Elsa betrayed Indy in The Last Crusade.
- As the temple is crumbling, Doofenshmirtz remarks "Probably my face will melt now, and for what?" which is a reference to the fates of Arnold Toht and Colonel Dietrich at the end of Raiders.