Red Dead Redemption Undead Nightmare Episode 5: A Civilized Man

"As Marston approaches Las Hermanas, he finds the Mother Superior being choked by one of the Undead at the train station there. She puts up a struggle before breaking free of the zombie and then manages to shoot it in the head, saving herself."
"When Marston reaches Casa Madrugada, he finds that while it is not overrun with the Undead, it is also not completely free of them either. John discovers very quickly the town is relatively safe because it is being protected single-handedly by Landon Ricketts."
"Upon entering the mansion in Escalera, Marston encounters an undead Abraham Reyes chasing a young woman around the large dining table. John shouts at Reyes and orders that Abraham stop chasing the girl. The undead Reyes then gives John his full attention and begins advancing..."