The unauthorized Tales of The Winchesters: Where's my Daddy?
10 parts Complete Penny Winchester, 15, is a Cryptologist and Bobby Singer's second. Penny is the daughter of John Winchester and youngest sibling to Dean and Sam. She is their half-sister.
When John went to work a case in Jericho and never checked in Penny began to worry that he went missing. Penny was used to hunters going disappearing; it was a fact of life. Hunters either ended up dead or missing; usually both.
With Bobby's blessing, Dean reluctantly collects his family, First Penny and then Sam. The Winchesters look for their father.
Along the way, they face several cryptids and some of their personal demons.
This Series begins with the First Episode and has plans to go to the end of the series in an alternative world where the Winchesters have a sister.
It is recommended that you watch the series in general. Some things will, of course, be changed because of Penny's existence.