Attack of the Killer Garage Sale

Season 1, Episode 4, Aired
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Episode Recap

Jazz is tutoring Dash, then Danny comes upstairs and Dash starts picking on him, so Danny goes back down to the lab. Dash invites Jazz to a party that he's hosting and she agrees to go under the one condition that he has to let Danny come too.

In the lab, Jack made a new invention, The Fenton Weasel, the Fenton Thermos gets stuck in it. Jack goes upstairs to get the Fenton Unlodger, then Danny puts the Fenton Weasel in reverse, which causes the thermos to hit the ghost portal button and unleashes Technus. Danny fights Technus, and manages to get him sucked inside the Fenton Weasel. The Weasel explodes with Technus inside, so all the lab equipment is covered in ectoplasmic goo, which is really Technus.

Later, Danny Sam, and Tuck are at the Nasty Burger, Dash invites Danny to his party. Danny is psyched about the party, he's so excited about being popular that he ditches his friends.

Danny has to buy some new hip clothes before going to the party. He decides to have a garage sale selling all the old junk from his dad's lab. Danny sells Dash a computer program, Portals XL, but little does he know that Technus is controlling all the junk. Danny gets enough money to buy his new clothes.

It's party night, and surprisingly, Jazz isn't going. Sam and Tucker didn't get invites, either. Danny has to go alone. While at the party, Danny realizes his mistake of ditching his friends. He goes upstairs, and then finds Technus! Technus is fusing all the junk to make one gigantic mechanical form. Technus and Danny fight in Dash's room, then it leads to outside. Sam and Tuck follow the junk. Danny calls for Sam and Tucker's help to defeat but they're reluctant to help, but then he apologizes.

Sam and Tucker find a way to shut down his source of power through Tuck's PDA (and help from Sam) and he returns to normal form. Danny traps him in the Fenton Thermos and he learns his lesson on being shallow.