The entire film will be directed by TV veteran John Showalter, who has also directed four past episodes of the series.
NBC ended up giving the series a 10 episode second season that premiered on March 1st.
Now the writers for the series have taken to Twitter to reveal that the finale will be shot in October and released in December.
Ryan and Kripke also commented on the two-part series finale, saying: “While we wish we could’ve made another dozen seasons of Timeless, this is the next best thing.