A depressed 39-year-old man is found dead in his home after complaining that he doesn't feel well. Dr. G. rules out suicide when she finds that he died from a severe case of pneumonia, most likely the result of an immune deficiency. When his blood tests positive for HIV, his ex-wife must also be tested to see if she is HIV positive as well.A 52-year-old English tourist has a heated argument with his family and walks back to his hotel. On his way back, he collapses on the sidewalk. Dr. G's autopsy confirms that he died of a heart attack, but his family worries that the stress from the argument may have played a role in his death.A 49-year-old man calls 911 complaining of a severe headache, but the paramedics find nothing wrong with him and leave. Later, the man is found dead by his girlfriend. Dr. G works to find out how the man died, and if his death could have been prevented if he had been taken to the hospital.