- CW Seed: The CW's official streaming service offers access to full episodes of Supernatural, including Season 5 Episode 18. You can watch the episode for free with ads, or you can subscribe to CW Seed for $4.99 per month to watch ad-free.
- Soap2day: This website offers free streaming of TV shows and movies, including Supernatural. You can watch Season 5 Episode 18 without having to create an account or sign up for a subscription. However, the website is known to have pop-up ads and other intrusive content, so be cautious when using it.
- Watch Series: Another free streaming site that offers Supernatural Season 5 Episode 18. The website is similar to Soap2day, with a large library of TV shows and movies available for streaming. However, it also has pop-up ads and intrusive content, so be sure to exercise caution when using it.
- 123Movies: This website offers free streaming of TV shows and movies, including Supernatural. You can watch Season 5 Episode 18 without having to create an account or sign up for a subscription. However, the website is known to have pop-up ads and other intrusive content, so be cautious when using it.
- Primewire: This website offers free streaming of TV shows and movies, including Supernatural. You can watch Season 5 Episode 18 without having to create an account or sign up for a subscription. However, the website is known to have pop-up ads and other intrusive content, so be cautious when using it.