Duncan Liddle

"Duncan! Hold the line! Hold the line!"

- Jon Snow to Duncan

Duncan Liddle is a minor character appearing in Season 5. He's played by an unidentified extra and debuts in "Hardhome". Duncan Liddle is a Ranger of the Night's Watch.

Season 5
Duncan accompanies Jon Snow on his expedition to Hardhome to convince the wildlings to join him at the Wall. When the White Walkers attack the settlement and their wights attempt to break through Hardhome's gates, the Free Folk attempt en masse to board boats to reach safety. Jon orders Duncan to hold the line.

In the books
In the A Song of Ice and Fire novels, the only Duncan mentioned as part of the Night's Watch is Duncan Liddle, known as Big Liddle, the eldest son of Torren Liddle, the head or clan chief of the Liddles, one of the northern mountain clans.

Duncan Liddle is first mentioned in the Appendix of A Dance with Dragons. He is not mentioned as being part of the expedition to Hardhome.