What character, voiced by Dan Castellaneta, starred in the second episode of the twenty-second season of The Simpsons?
Loan-a Lisa: "Loan-a Lisa" is the second episode of "The Simpsons"' twenty-second season. Loan-a Lisa:  In the episode, Lisa helps fund Nelson's bicycle company with money Grampa Simpson gives her as part of his inheritance, but after Nelson meets Facebook founder Mark Zuckerberg and is convinced he can be successful by dropping out of school, Lisa tries to convince Nelson to stay in school. Grampa Simpson:  Voiced by Dan Castellaneta, he is the father of Homer Simpson and the grandfather of Bart, Lisa and Maggie Simpson.
Grampa Simpson