Rob Brownstein

When the IRS accuses Sheldon of making a mistake, he'll stop at nothing to prove them wrong; Dale is forced to get a colonoscopy and tries to convince Meemaw to join him.

A mystery woman at the office blood drive catches Michael's eye, Dwight and Kevin both find women at the 'Lonely Hearts Party', while Jim and Pam are forced to leave because of PDAs.

Taylor Townsend manages to seize a night with Seth by throwing a Harbor School event that keeps Summer at a distance.

Rory offers to help Logan write an article for the Yale Daily, but she is disappointed when he doesn't invite her to be his date at a book-signing party hosted by his father.

When the NCIS team learn that 10 kilos of highly toxic chemical weapons are now in the hands of Mamoun Sharif, a wanted terrorist, they have to find a way to find the man and stop him before it's too late, while being aided by Army Lt Col Hollis Mann and constant phone calls from Sharif himself.

Bonnie is upset when Adam makes a big-ticket purchase without consulting her; Jill has an unexpected reaction when her dentist retires.