Last week's episode of "Supernatural" season 12 showed Mary Winchester stole a unique weapon secretly - The Colt, which belongs to Prince of Hell Ramiel who was killed by Sam by stabbing him using the Lance of Michael. An old character is also set to make a comeback in tonight's episode.

"Supernatural" season 12 episode 13 ‘Family Feud' synopsis (via TV Guide) says that Sam and Dean are going to investigate a mysterious murder at a museum and then they will learn that the murder is linked to a ghost from a merchant ship, which sank in 1723. They will also learn that the same ship called The Star that Crowley's son Gavin should have been on board and will ask help from Rowena to search Gavin with them.

Meanwhile, an angel will also try to murder Kelly Kline, who is still pregnant with Lucifer's child and will take refuge with a demon. A sneak peek video was released by The CW for the upcoming "Supernatural" season 12 episode 13 showcasing the Winchesters getting their hands on the case where Dean says that he thinks their mother is actually keeping something from them.

In "Supernatural" season 12 episode 13, Mary, on the other hand is also shown trying to excuse herself and appears to be too tired so as not to join her two boys in solving their most recent hunting case, according to a report. In the previous episode, it was revealed that she was working with the British Men of Letters and transported The Colt to the supernatural-fighting organization after stealing it from Prince of Hell Ramiel. So, it looks like that she will come clean to her sons as if she didn't do something or get caught keeping the truth from them.

The Winchester brothers' thrilling and horrifying adventures continue as they face yet another mystery case to solve. "Supernatural" Season 12 airs Thursdays at 8 PM EST on The CW. Stay tuned to Mobile & Apps for more entertainment updates.