CPAP Machine - Episode 57 - Who Did It First?
Hot Dog - Episode 56 - Who Did It First?
Vinyl Records - Episode 55 - Who Did It First?
Escalators - Episode 53 - Who Did It First?
Lacrosse - Episode 52 - Who Did it First?
No-Hitters - Episode 51 - Who Did it First?
Triathlons - Episode 48 - Who Did It First?
Baseball Cards - Episode 47 - Who Did It First?
Fireworks - Episode 46 - Who Did It First?
Braille - Episode 45 - Who Did It First?
Grilled Cheese - Episode 43 - Who Did it First?
Lightbulbs - Episode 42 - Who Did it First?
Tooth Fairy - Episode 41 - Who Did It First?
Golf - Episode 40 - Who Did it First?
Bigfoot - Episode 39 - Who Did it First?
Phillips Screwdriver - Episode 38 - Who Did it First?
Piñatas - Episode 37 - Who Did it First?
Fondue - Episode 36 - Who Did It First?
Cuckoo Clocks - Episode 35 - Who Did It First?
Baseball - Episode 34 - Who Did it First?
Easter Eggs - Episode 33 - Who Did It First?
Microphones - Episode 32 - Who Did It First?
St. Patrick's Day - Episode 31 - Who Did It First?
Saunas - Episode 30 - Who Did It First?
Bidets - Episode 29 - Who Did It First?
Jeff's Dad - Episode 28 - Who Did It First?
Waterbeds - Episode 27 - Who Did It First?
Waffles - Episode 26 - Who Did It First?
Chainsaws - Episode 25 - Who Did It First?
Vending Machines - Episode 24 - Who Did It First?
Deadly Foods - Episode 23 - Who Did It First?
Lego - Episode 22 - Who Did It First?
Air Conditioners - Episode 21 - Who Did it First?
Blenders - Episode 20 - Who Did It First?
Christmas Part 2 - Santa - Episode 19 - Who Did It First?
Christmas Part 1 - Stockings - Episode 18 - Who Did It First?
Eggnog - Episode 17 - Who Did It First?
Scuba Diving - Episode 16 - Who Did It First?
Modern Thanksgiving Traditions - Episode 15 - Who Did It First?
Balloons - Episode 14 - Who Did It First?
Watches - Episode 13 - Who Did It First?
Underwear - Episode 12 - Who Did It First?
Jack-O'-Lanterns - Episode 11 - Who Did it First?
Haircuts - Episode 10 - Who Did It First?
X Rays - Episode 9 - Who Did It First?
Artichokes - Episode 8 - Who Did It First?
Pumpkin Spice - Episode 7 - Who Did It First?
Urinals - Episode 6 - Who Did It First?
Breast Implants - Episode 5 - Who Did It First?
Toupées - Episode 4 - Who Did It First?
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