Visit the Amazon.com website. Choose Amazon Instant Video from the drop-down menu at the top of the page.
Type 24 in the search area at the top of the page and hit the word "go," which is written in an orange hexagon shape next to the search box. The page that appears will list all eight seasons of "24." Under each season, there is a choice to buy individual episodes or the whole season. As of April 2011, each episode cost 99 cents. The entire season cost $23.76.
Click on the "buy episodes" choice under the appropriate season for the show you want. You will see an image of the show on the left and a description of the episode. It should look like this: 24 Season 8, Ep. 1 "Day 8: 4:00-5:00 pm." Underneath this title will be a short description of the episode, the run time and the original air date.
Click on the "buy this episode" selection to go to Amazon's sign-in page and purchase the episode. If you're a new customer, you will be asked to create an account.
Type in the website address nextflix.com. On the top right section of the screen, there will be a box that reads "Start your 1 month free trial." Fill in your email address, create a password if necessary and hit "Continue."
Fill in your name, address and phone number on the right side of the page and hit "Continue."
Go to the search box and type in the word "24," and the season of the episode.
Find the episode from the list that appears on the bottom half of the screen. Hit the "Play" box next to it to launch a stream of the episode.