The Company(Season 7, Episode 20) ION. Morgan's missing cousin, Cindi, reappears, and Morgan must come clean about a lie he told concerning her. In addition, the BAU reopens the investigation into Cindi's disappearance.
Selenium in biology. Although it is toxic in large doses, selenium is an essential micronutrient for animals. In plants, it sometimes occurs in amounts toxic as forage, e.g. locoweed. Selenium is a component of the amino acids selenocysteine and selenomethionine.
Selenium, in conjunction with vitamin E, is necessary for proper immune system function and to protect the integrity of cell membranes. However, a delicate balance exists between too little selenium and too much. In many areas of the country, horses ingest sufficient selenium while foraging, but in other areas, selenium needs to be part of the horse's diet.