A mysterious visitor, Seven, tries to convince Captain Kirk to let him disarm a nuclear missile/warhead that is heading for Earth. With Spock unable to do it himself, the crew is left with no choice but to trust him.

Movie star and straight A student Natalie Portman has homework to do just like any other schoolgirl, and reveals that she sometimes finds herself in the same kind of trouble as a normal teenager.

A 14-year-old Natalie Portman talks with David Letterman and Alec Baldwin about starring in R-rated movies and getting straight As in high school.

Sigrid concludes this "personal journey into the unknown" with optimism about harnessing creativity in order to live a more fulfilling life with Alzheimer's even though it might not slow it down. We have to live in the present!

A year has gone by and Sigrid is back in Tacoma to spend time with her sister, Sylvia. Things have changed quite a bit, and Sigrid shows us Sylvia's new setup.

The two sisters talk about how important singing was for them growing up and Sylvia sings a little bit, too. This is their final appearance together on video before Sigrid's departure the next day.

Sigrid and Sylvia converse in the kitchen over coffee. They talk about coffee, about the city of Tacoma, about their month together, and about what they see out the window. Sylvia enjoys making sound effects with her voice every now and then.

Sigrid and Sylvia continue to work on making coffee. Meanwhile, they talk about what time of day they like to drink it and what they put in it.

Sigrid and her sister Sylvia hang out in the kitchen talking about coffee and making some, too. At times, they get a bit silly.

The two sisters talk about coloring, one of Sylvia's favorite things to do and they look at some of the work she has done.

The two sisters unpack a box that hadn't been opened since she moved to the house in Tacoma. It contains artwork she had done in the past along with some stray art supplies.

Sylvia talks about how her diagnosis was reached and about what limitations there are for her now, such as going out for walks by herself and singing in the choir at church.

Sylvia is willing to talk about her Alzheimer's diagnosis, even though she struggles to form sentences and find the right words.

Dale walks us through the essentials for establishing whether you are a cowboy or not. One thing he doesn't mention is the constant use of "ain't" instead of "are not."

Sigrid talks about the reality of conversing with someone who has Alzheimer's. They often have trouble finding the word for the thing they are thinking of.