TV series example of the word

The Big Bang Theory Season 3, Episode 2
Why be polite to the world's leading expert on the dung beetle?

The Big Bang Theory Season 7, Episode 15
leading a train of meticulously restored

The Big Bang Theory Season 2, Episode 1
Either the reason is predicated on a series of sub-reasons leading to regression...

Game of Thrones Season 7, Episode 3
and Jaime Lannister leading our armies,

Game of Thrones Season 5, Episode 6
He was leading an expedition beyond the Wall.