Still here? Fantastic! So... forget what I predicted here. In the last episode, Walter cleared his family of involvement in his meth kingdom. They are out of the picture and out of his life, and he's out of theirs.
He took his barrel of money and left Albuquerque in the last episode, but we know he comes back for the ricin pill. Why would he do such a thing?
I think he decides to rescue Jesse. He also owes Todd and his family big time revenge for killing Hank. Now, Walt can't just waltz into Todd's family's place with a gun and shoot 'em up. He'd never be able to take them all out, and he'd just end up dying before he could execute part two of his plan, rescuing Jesse. No, he's got to drop them all at once. He's going to give them the ricin.
So what happens after he frees Jesse? Jesse knows, now, how Walt let Jane die. I think Walt is ultimately going to commit suicide-by-Jesse in freeing his partner.
Only two more episodes, and this wild ride will be over. Who do you think the ricin pill is for? How do you think it will all end?
And just in case you've missed it, here's Jimmy Fallon's parody of Breaking Bad: