Susanna Dickinson is shown being attacked by Native Americans (unaccountably dressed like the Dakota tribe) while in the custody of the Mexican army. Actually, she was returned peacefully to the Texians. Besides, the Tonkawa tribe that occupied the area were allied with the Europeans against the Cherokee, so it's highly unlikely that they would have attacked settlers.
The Scouts spot a wagon bearing Susannah Dickinson and other Alamo survivors on a wagon, escorted by Mexican cavalry, under attack by Karankawa.
When General Santa Anna release the women and children of the Alamo, Sussanah Dickinson, her daughter, Bowie's slave-Joe, and a freed slave named Ben, whom was Colonel Almonte's cook, were the only members of this party. They rode horses out of San Antonio and encountered Texian scouts 20 miles outside of Gonzales that escorted them back to General Houston. They weren't escorted by Mexican soldiers, nor encountered Karankawa.
When General Santa Anna release the women and children of the Alamo, Sussanah Dickinson, her daughter, Bowie's slave-Joe, and a freed slave named Ben, whom was Colonel Almonte's cook, were the only members of this party. They rode horses out of San Antonio and encountered Texian scouts 20 miles outside of Gonzales that escorted them back to General Houston. They weren't escorted by Mexican soldiers, nor encountered Karankawa.
General Santa Anna is shown speaking English in the series. In real life, after his capture at San Jacinto, he needed Colonel Juan Almonte to translate for him when speaking to General Houston and other officers.
The Alamo fell on the morning of March 6th, not March 7th.
Bugle call used in Houston's camp was the more modern "To the Color", which doesn't appear in the US Army manuals until the 1880's.
And the only musicians Houston had was a fife and drum, who played "Come to the Bower" during the battle of San Jacinto.
Several characters (Gator Davis for one) are shown wearing hats with feathers from a ring-necked pheasant. This entire episode takes place in 1836, but ring-necked pheasants are not native to North America and were not introduced here until the 1880s.
Terrain shown has no relationship whatsoever with actual South Texas terrain between San Antonio and Houston. There are no mountains, cliffs, rock formations as used in the filming.