Soap opera, TV Drama?

Nowadays I am watching TV series

Grey's Anatomy: Season 1, 2, 3, 4, and 5

 now, I am watching season 2.

Previous time, I watched

LOST: Season 1, 2, 3, 4, and 5

 I already watched season 1, 2, and 3.

HEROES: Season 1, 2, and 3

 I already watched season 1, 2.

and NOW, I'm watching Gray's Anatomy.

Previous time, I have watched 24, Numb3rs, ... 

When I was school student, I have watched many Americana's TV series,

for example MacGyver, Air Wolf, The Wonder Years and so on.

In the future, can I watch these TV series without caption?