The Second Chaka
The Second Chaka started his adventures in The Nether after regenerating. Without his TARDIS, he begins to search for a way back home. He meets Mike, a resident of The Nether, who joins him on his adventures with many enemies. He eventually repairs his TARDIS and continues his adventures across the universe with Winter.
The Second Chaka first appeared in Chaka Who #2.1, where he finished regenerating on The Nether roof...