Jesse tells Walt that Gus is vulnerable when he visits Hector in his nursing home .
Andrea 's son Brock falls desperately ill , and Walt convinces Jesse that Gus poisoned the boy with ricin , gaining his help to get rid of Gus .
Jesse tells Walt that Gus is vulnerable when Walt visits Hector in Walt 's nursing home .
Andrea 's son Brock falls desperately ill , and Walt convinces Jesse that Gus poisoned the boy with ricin , gaining his help to get rid of Gus .