ดิอะเมซิ่งเรซ 20
ฤดูกาลนี้เริ่มออกอากาศในวันที่ 19 กุมภาพันธ์ 2555 และจะออกอากาศตอนสุดท้ายในวันที่ 6 พฤษภาคม 2555 ซึ่งจะเป็น 2 ชั่วโมงสุดท้ายติดต่อกันเนื่องจากได้เว้นว่างไป 1 สัปดาห์ที่ทางสถานีได้ถ่ายทอด คันทรี มิวสิก อาวอร์ด เช่นเดียวกับปีที่แล้ว
ดิอะเมซิ่งเรซ 8
ฤดูกาลนี้มีกำหนดออกอากาศตอนแรก 2 ชั่วโมงเต็ม ในวันที่ 27 กันยายน พ.ศ. 2548 ทางซีบีเอส และจะออกอากาศตอนแรกในประเทศไทย เวลา 20:00 น. ของวันที่ 28 กันยายน พ.ศ. 2548 ทางช่อง AXN ยูบีซีช่อง 19 ส่วนตอนสุดท้าย จะออกอากาศในวันที่ 13 ธันวาคม พ.ศ. 2548ตารางแสดงชื่อ ความสัมพันธ์ของผู้แข่งขันในขณะถ่ายทำของแต่ละทีมพร้อมทั้งแสดงสถานะในการแข่งขัน ดังนี้ เรียงตามลำดับผู้เข้าเส้นชัยก่อน (ตารางนี้อาจไม่ได้แสดงข้อมูลที่ตรงกับข้อมูลที่ออกอากาศในโทรทัศน์เนื่องจากข้อมูลที่เพิ่มเข้ามาบางส่วน หรือข้อมูลที่ถูกนำออกไปบางส่วน)
ชื่อตอนในการแข่งขันมักมาจากคำพูดสำคัญ ๆ ของผู้เข้าแข่งขันในเลกนั้น ๆในบางเลก ทางรายการจะมีรางวัลพิเศษให้กับทีมที่มาถึงจุดพักเป็นทีมแรก สำหรับรางวัลที่เป็นแพ็กเกจทัวร์ทั้งหมดสนับสนุนโดย
The first Detour of the race was Build it or Buggy It. In Build It, teams needed to use the materials provided to build a miniature, working watermill. Buggy It required teams to transport a traditional Amish buggy along a 1.5-mile course with two members riding in it.
The Roadblock required a racer to whisper a code phrase ("The sky is blue") to "spies" walking in the area around the Tidal Basin. Of the fifty spies, ten would reply with another phrase ("The sea is green"). Once the racer had found one of the ten spies, they would receive their next clue. The Detour choices, Heat of the Battle and Heat of the Night, were both part of a full scale American Civil War reenactment. In Heat of the Battle, teams had to transport five "injured" people to a tent. Heat of the Night told racers to take a keg of kerosene to a table. Once there, they had to fill 20 lanterns with the kerosene and light them. After completing the Detour, the teams had to grab a Civil War flag and take it to the nearby pit stop.
The Detour choices for this leg were Forrest Gump or Muddy Waters. In Forrest Gump, teams had to travel to Wando Shrimp Co. to de-head 200 pounds of shrimp. In Muddy Waters, teams had gone to Ridgeville Mud Run to drive through a 3X4 SUV obstacle course which was filled with mud. In the course, if they got stuck, they would have to wait to be towed out. Once towed out, they would have to restart the course. In the Roadblock, two racers from each team rode a centrifuge at 3.2 แรง g.In the Roadblock, teams had to climb to the top of the Worlds Largest Office Chair. It is a similar to unaired Roadblock in leg 10 of season three. The Detour was Work or Play. In Work, Teams used a two-person handsaw to cut four slices off a log 12 inches in diameter. In Play, Teams made their way to a riverboat where they played 21 against a professional dealer. To win a round, the hand of each team member needed to total more than the dealer’s hand, or the dealer must bust (the dealer's hand goes over 21). Once the Teams won three rounds, they would earn their clue.
In the Race's only aired Fast Forward, team members had to jump in tandem off a 140 foot drop, when all members completed the drop, they would win the Fast Forward. The Detour was Rhythm or Coos. Rhythm required teams to deliver four musical instruments to a local club. The musical instruments are saxophone (in Teatro Nacional de Panama), trumpet (in Escuela Simon Bolivar), conga drum (in Casa Góngora‎) and trombone (Instituto Nacional de Cultura). Coos required racers to use binoculars and search within the rainforest canopy for wooden replicas of five local bird species. They have to circle the correct bird species on the provided bird identification card. When all five were circled, they present the card to the ranger who would confirm their choices. The Roadblock for this leg of the race required one team member to hit one baseball pitched by a local little leaguer.In the Roadblock, one person from each team searched for a red bean among 800 pounds of coffee beans. The Detour was Relic or Ripe. In Relic, teams had to recover four Mayan relics in Rainmaker . In Ripe, teams had to harvest 15 bushels of bananas in Frutas Selectas del Tropico.The Detour on this leg was Brush or Barrel. In Brush, teams had to go to Taller Eloy Alfaro in Sarchí and painted two cartwheels with the same design as the sample they were given. In Barrel, teams loaded sugarcane in Ingenio La Argentina and transported sugarcane 6 miles to a warehouse of Fabrica Nacional de Licores, where they would find a hidden clue among dozens of rum barrels. The Roadblock had one person from each team compete in a 50 lap Superkart race.
In the Roadblock, one team member had to perform a 360 degree loop in an airplane. The Detour choices in Horseshoe Bend, Arizona were Bearing or Bailing. In Bearing, teams had to locate three locations on three different islands, using a compass bearing. In Bailing, teams had to bail water from a submerged boat and carry it onshore.The Detour on this leg of the race was Drop Down or Ride Down. In Drop Down, teams completed a two-stage rappel 270-feet down into Bull Canyon. In Ride Down, Teams selected bikes and rode a six-mile course down into Bull Canyon. The Roadblock had team members ski jump into the olympic pool.
On the first half of the leg, the Detour was Spike It or Steam It. In Spike It, teams used old-time materials and tools to complete a 20-foot section of railway track. In Steam It, teams used buckets to fill the tender of an old-time steam locomotive with 400 pounds of coal. The first Roadblock of the leg featured two team members riding horses to corral six cattle from a holding pen.