colbert? we caught rare moments of colbert playing in straight in 2010 called to testify by a house subcommittee. >> migrant workers suffer and have no rights. >> reporter: his heartfelt records stemming from some made for tv moments in a recurring segment on his show colbert spent a day in the life of a migrant working parking corn and picking beans. >> and what's different about it? >> reporter: colbert was thrown into the national spotlight when cast as a correspondent on the daly show with jon stewart. >> so -- the exciting news today is, i no longer need a cable subscription for the privilege of watching colbert. >> reporter: will late show viewers like the real colbert, as much as the character he's played so well for so long? as dave letterman gets ready to hands over the reins he's already speaking out publicly in support of colbert saying he was flattered by cbs's choice for his successor and calls colbert