Robert Downey, Jr. might be known for his Oscar-Nominated role in “Chaplin” or such films as “Less Than Zero” and “Kiss Kiss Bang Bang.” But on this episode of Payback, he’ll play the part of prankster as he delivers a slick H3 to his unsuspecting buddy, Jimmy Rich. As Downey explains it, Jimmy is his right-hand man both personally and professionally. He’ll tell you that he hasn’t done enough to show Jimmy his gratitude for being such a great friend. And he’ll narrate as only Downey can – in his candid, irreverent style that’s made him a Hollywood favorite.

Boston Red Sox outfielder Manny Ramirez is one of the most well known Major League Baseball players of our generation. But on this Payback episode, Ramirez pays tribute to his mentor, Carlos Ferreira, the man he credits with teaching him how to play the game.Behind the scenes at Red Sox spring training at City of Palms Park in Ft. Myers, Fla., Carlos thinks he’s attending the game to watch Ramirez and take notes on his technique. This has been standard practice for years - the teacher critiquing his student after every game – and Ramirez welcomes it. He’s so thankful for Carlos’ faithful tutelage that the ten-time All-Star gave him his 1999 American League MVP ring. Carlos has no idea he’s about to receive a brand new, tricked-out Cadillac EXT.

Bud Brutsman, creator of hit reality shows Overhaulin’ and Rides, brings back to SPEED the original series Payback debuting May 31 at 9 p.m. ET.

Payback will tell intriguing stories covering all walks of celebrity life, from the music industry, silver screen and professional sports world. Tim Allen, Jamie Pressly, Ken Shamrock, Manny Ramirez, Travis Barker are among those that customized a cool GM vehicle for the person that made a difference in their life.

Bud Brutsman, creator of hit reality shows Overhaulin’ and Rides, brings back to SPEED the original series Payback debuting May 31 at 9 p.m. ET.

Payback will tell intriguing stories covering all walks of celebrity life, from the music industry, silver screen and professional sports world. Tim Allen, Jamie Pressly, Ken Shamrock, Manny Ramirez, Travis Barker are among those that customized a cool GM vehicle for the person that made a difference in their life.

According to Brutsman, his goal is to create a show touching people’s lives on many different levels. “You can’t believe how much fun these celebrities are having with each show,” Brutsman continued. “It’s simply amazing to see how honored and blown away each recipient is when a celebrity who is close to their heart takes this much time to do something amazing for them. “PLEASE SEE THE SPEEDS WEBSITE FOR SCHEDUAL "