Season 3 |
| 54 :03x01 - Episode 301/302 (Sep/05/2008) | | Contestants for this episode include Kathy Ireland and Georgia state superintendent of schools Cathy Cox help open season 3. | |
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| 55 :03x02 - Episode 303 (Sep/12/2008) | | A pair of identical twins and a mother of quintuplets are the contestants for this episode. | |
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| 56 :03x03 - Episode 304 (Sep/19/2008) | | A dentist is this episodes contestant as he takes on children in a competition to see how much he has forgotten since leaving school. | |
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| 57 :03x04 - Episode 305 (Sep/26/2008) | | An Ivy league graduate from Cornell University is the contestant for this episode. | |
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| 58 :03x05 - Episode 306 (Oct/03/2008) | | A former NASA astronaut gets a challenge from the kids in his attempt to win $1,000,000. | |
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| 59 :03x06 - Episode 307 (Oct/10/2008) | | Ken Jennings, the man who won the most money ever on Jeopardy, takes his shot at winning the million dollar payoff. | |
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| 60 :03x07 - Episode 308 (Oct/24/2008) | | The youngest mayor in the nation, 19 year old John Tyler Hammons of Muskogee, OK. challenges the fifth graders in a battle of knowledge. | |
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| 62 :03x09 - Episode 310 (Nov/07/2008) | | Legendary rocker Gene Simmons from Kiss challenges the fifth graders, while playing for the Elizabeth Glazer Pediatrics AIDS Foundation. | |
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| 63 :03x10 - Episode 311 (Nov/14/2008) | | TV newcaster Deborah Norville and former NBA player and current actor Rick Fox challenge their knowledge against the fifth graders. | |
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| 64 :03x11 - Episode 312 (Nov/21/2008) | | Guest Jennie Garth of "Beverly Hills 90210" tests her knowledge against a fifth grade student. | |
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| 66 :03x13 - Episode 313 (Dec/11/2008) | | A rabbi who was educated in the Ivy League takes his shot at winning $1 million Hanukkah prize against a fifth grade student. | |
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| 73 :03x20 - Episode 319 (Jul/03/2009) | | Hot dog eating champ Mark Chestnut takes on the group of fifth grade students in a battle of knowledge, hoping to win up to $1 million for charity. | |
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| 74 :03x21 - Episode 315 (Jul/10/2009) | | Comedian Larry the Cable Guy takes on a fifth grader in a battle of knowledge. | |
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| 75 :03x22 - Episode 316 (Jul/17/2009) | | Star Jones and animal expert Jack Hanna each play against a fifth grade student to raise money for charity. | |
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| 76 :03x23 - Episode 317 (Jul/24/2009) | | Boxing legend Sugar Ray Leonard and former professional wrestler Bill Goldberg go to battle for charity. | |
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| 77 :03x24 - Episode 320 (Aug/07/2009) | | This episode features real-life survivors, including surfer Bethany Hamilton who survived being attacked by a shark, and Jill Finley, who woke up unexpectedly from a coma in 2007 after being removed from life support by her family. | |
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| 79 :03x26 - Episode 321 (Sep/11/2009) | | Contestants include an extreme sports enthusiast and a consultant for weight loss as they try to win up to $1 million. | |
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| 80 :03x27 - Episode 322 (Sep/18/2009) | | Nobel laureate George Smoot, who shared a 2006 physics award for his accomplishments in cosmic microwave background radiation, challenges a group of fifth graders for charity. | |
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