Agents of SHEILD

Who watches it? I've only seen the last 2 episodes and I only have the slightest idea on what's going on. The only character I'm familiar with is Agent Phil.

If it helps I've also been watching the other films that tie into the whole franchise hoping things would make a bit more sense to me. And I did see The Winter Soldier.

Is there anywhere I can watch all the episodes online for free?

Thanks☺