. >> i'm erin robinson. phil: these 11 teams connect with millions of people every day. >> birmingham! phil: what happens when you take the world's biggest social influencers offline? >> this is how i hitchhike. whoo! >> amazing. >> amazing. phil: to race each other in the real world? time to find out. >> mom? phil: our teams are at home and have no idea the race is about to start now. >> mom? >> phil keoghan! wait, how do i get it? >> what do you want, phil in

. >> i'm erin robinson. phil: these 11 teams connect with millions of people every day. >> birmingham! phil: what happens when you take the world's biggest social influencers offline? >> this is how i hitchhike. whoo! >> amazing. >> amazing. phil: to race each other in the real world?

. >> i'm erin robinson. phil: these 11 teams connect with millions of people every day. >> birmingham! phil: what happens when you take the world's biggest social influencers offline? >> this is how i hitchhike. whoo! >> amazing. >> amazing. phil: to race each other in the real world? time to find out. >> mom? phil: our teams are at home and have no idea the race is about to start now. >> mom? >> phil keoghan! wait, how do i get it? phil: you're about toe embark on the adventure of a lifetime in 21 days you'll visit 18 cities in 10 countries and travel more than 27,000 michaels. and i have your next clue here in mexico city at the monument of the revolution. >> monument of the revolution. >> we're going to mexico city. first time when i say go, grab your bags, run outside, make your way to the nearest airport and then find me here in mexico. >> ah! ph: let's get things started. >> we're starting right now. >> oh, my god. phil: the world is waiting for you. >> oh, my god. phil: good luck. travel safe. >> no w