Legends of Tomorrow: All Dogs go To Heaven

What if during one of their missions in the past, they came across two dogs who happened to have the ability to talk! At the end of S5 episode 4, the Legends detected a hellhound in San Francisco. So Sara and the rest of the Legends decided to check it out. On the way, they come Charlie and Itchy. The two dogs decide to help the legends catch the hellhound. After that, the Legends offer Charlie and Itchy to join them. Given permission from Annabelle, Charlie B Barkin and Itchy Itchiford now join the Legends in their adventures to protecting time.