Denny came to town under mysterious circumstances and seemed to be shady.
However, viewers weren’t always certain about the pair’s connection.
While Doc was thrilled to welcome Denny into his family, he was also confused.
Rose went on to welcome the pair’s son, Denny’s father.
This left him with very little family and a yearning to get to know his paternal grandfather.
However, the reason for Denny’s behavior later became very clear.
In addition, Denny revealed that he needed medication because he was suffering from Huntington’s Disease.
