Chaya Lipschutz, an Orthodox Jewish woman from Brooklyn, donated her kidney to a stranger. After that, she decided to spend all her time trying to match up potential donors with kidney patients.

When Sarah was 10 years old, she got a heart transplant. Soon after, her mother decided to find out more about the person who saved her daughter's life.

Brady Udall tells the story of the time he helped a stranger get his car out of a ditch. In exchange, the man promises to help him any time, for any reason—legal or not.

Chaya Lipschutz wanted to donate one of her kidneys to a stranger. But to save a stranger's life, she had to break the commandment against lying.

A former heroin addict realizes that he wants to help other addicts kick their habits. The problem is, he wants to do this using a hallucinogenic drug – ibogaine – that is completely illegal, and which requires medical expertise he doesn't have.

Ira and Albert Donnay read a true ghost story that appeared in a medical journal in 1921. A "Mrs.

Psychologist Harry Harlow sets out to prove, through a series of experiments with monkeys, that love is a key to normal development in children.

Dan Savage made a pledge over a decade ago that he hoped would just vanish. But it somehow returns from oblivion.

Karen Sosnoski's one-year-old son, Anton, was born with what's known as Mosaic Down Syndrome, a rare condition where some of his cells have the extra chromosome that causes Down syndrome and other cells don't. So as he grows, he could end up having all the health risks and challenges of Downs syndrome...or just a few of them. Through a website, Karen found a kid with the same diagnosis, named Tim Colvin, who was doing really well...perhaps because his mother, Kristy, invented a surprising and unusual way to raise her son.

Host Ira Glass describes the thing that we all do at some point: Talk expertly about something we don't actually know anything about. It's so common, explains This American Life contributing editor Nancy Updike, that some friends of hers invented an imaginary magazine devoted to such blathering.

Until recently, most insurance companies didn't want doctors to apologize to patients they'd harmed, for fear it could be used against them in lawsuits. Now, though, there's a new movement encouraging doctors to 'fess up and say sorry.

Susie and John Drury moved to their farm just two years ago. But when John got sick for awhile, people who were no more than friendly acquaintances started helping out in ways that completely surprised them.

Lisa Carver's nine-year-old son, Wolfgang, was born with a rare illness that, among other things, makes it impossible for him to eat anything by mouth. He's fed through a g-tube, straight into his stomach.

Host Ira Glass talks with Dr. Stephen Rosenberg of the National Cancer Institute about a cancer patient of his who spontaneously healed.

When you get to know someone, really know them, you can almost predict their behavior. It's comforting, this intimacy.

Producer Alex Blumberg explains that he wanted to do this show because of his conflicted relationship with his own testosterone. He tells host Ira Glass that the reasons go back to a girl in his eighth-grade homeroom and the 1970s seminal feminist novel The Women's Room. We also hear from a man who stopped producing testosterone due to a medical treatment and found that his entire personality was altered.