GLAAD EXCLUSIVE VIDEO CLIP: Zachary Quinto has a bewildering blast from the past in NBC's "Who Do You Think You Are?"

"112 years before I would get the role of Spock, my great grandfather put that phrase in a letter. What are the chances of that?!"

No, Zachary Quinto has not purchased a time machine, though he may have access to the next best thing. Who Do You Think You Are? is an Emmy-award winning docuseries where special celebrity guests go on a poignant search to trace their family tree with the help of genealogists, historians and experts. In an exclusive clip of the show, Quinto reviews letters published by his great great grandfather and discovers a message chillingly similar to a catchphrase of an iconic role of Quinto's: beloved Star Trek character Spock.

Watch the clip below: 

The all new season of Who Do You Think You Are? features Allison Janney, Zachary Levi, Nick Offerman, Billy Porter, Zachary Quinto and Bradley Whitford. Who Do You Think You Are? airs Sundays at 7 on NBC and is available to stream on Peacock!