Lord Snow here recommends
sealing the TUNNEL,
Game of Thrones Season 4, Episode 7
We should seal the TUNNEL.
Game of Thrones Season 4, Episode 7
It's because I spent the whole morning...
digging the TUNNEL.
Money Heist Season 1, Episode 4
They are working with heavy machinery.
Indeed, they’re building a TUNNEL.
Money Heist Season 1, Episode 11
Into the TUNNEL and out the other side.
Game of Thrones Season 1, Episode 3