You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who plays dr k on this is us?" whose answer is Gerald McRaney.
Each document should contain about 30 words, and these documents should contain useful information.

Query: who plays dr k on this is us
Useful Output:

Doc 1: Season two of This Is Us, from left: Mackenzie Hancsicsak as Kate, Parker Bates as Kevin, Milo Ventimiglia as Jack, Mandy Moore as Rebecca,
Doc 2: Gerald McRaney as Dr. K in This Is Us - Season 4. Mitchell Haddad/NBC. Gerald McRaney (Dr. K). Another quick fan favorite, McRaney's Dr. K
Doc 3: A timeline of all the major Pearson family moments in NBC's 'This is Us,' from very beginning through the series finale, in chronological
Doc 4: Dr. K (Gerald McRaney)  Dr. K's words about lemons will forever remain a pillar for the show, no matter how many seasons Dan Fogelman makes of
Doc 5: Nathan Katowsky. Dr. K was the OB/GYN who delivered Rebecca's babies and helped her and Jack recover from the loss of one of the triplets, which