The CW has released the official synopsis of the twelfth episode of Supernatural‘s eighth season, titled “As Time Goes By.”

The official press release had the following information about the episode:

SAM AND DEAN MEET THEIR GRANDFATHER — Sam (Jared Padalecki) and Dean (Jensen Ackles) are stunned when a man who claims to be Henry Winchester (guest star Gil McKinney), their grandfather, suddenly appears in their hotel room demanding to know where he can find John Winchester. Henry has time-traveled to stop a demon named Abbadon (guest star Alaina Huffman) and was looking for John’s help. Through Henry, Sam and Dean learn more about their father and the Winchester blood line. Serge Ladouceur directed the episode written by Adam Glass (#812).

We previously reported that in this episode, Henry, who is described as “Robert Downey Jr. meets Cary Grant” as well as “dapper, smart, and considerably cocky,” is transported from 1958 to the present day after joining an anti-demon cult.

However, we also learned he will not make the trip alone. He will be followed through time by Josie Sands, a 28-year-old “sexy, strong Katharine Hepburn type…with a secret.”

“As Time Goes By” airs Wednesday, January 30 at 9:00 p.m. ET.

Supernatural returns from winter hiatus with new episodes on Wednesday, January 16 at 9:00 p.m. ET.