Basic Genealogy

"Basic Genealogy" is the eighteenth episode of the first season of the American comedy television series "Community". It aired in the United States on NBC on March 11, 2010.
Plot.
During Family Day at Greendale, Pierce (Chevy Chase) tries to re-connect with his step-daughter Amber (guest star Katharine McPhee) who becomes attracted to Jeff (Joel McHale). Britta (Gillian Jacobs) gets spanked with a switch by Troy's Nana (Fran Bennett) and Shirley's sons cause havoc for Abed's father (Iqbal Theba). In episode 17 "Physical Education" Jeff makes a comment to Leonard about his family appearing at family day, which occurs in this episode. At some point episodes 17 and 18 were presumably switched. Both Sony DVD and Mill Creek Blu-ray releases use this inaccurate order.
In the end tag, Troy (Donald Glover) and Abed (Danny Pudi) are trapped in the student lounge vending machine.
Reception.
Around 4.7 million Americans watched "Basic Genealogy".
Emily VanDerWerff of "The A.V. Club" was disappointed in the episode and rated it a B. She said that this was the "first week where the sentimental moments and the hugging and the 'You can be a good person, Jeff Winger!' pep talks felt like they sort of overwhelmed some of the other elements of the show that I typically enjoy" and singled out guest star Katharine McPhee for an inconsistent performance.