Template:External spoiler
From Tardis Wiki, the free Doctor Who reference
Instructions for {{External spoiler}}
{{External spoiler}} is a template that emplaces a warning against external links which lead to places that contain spoilers. This template should not be over-used. If an article contains only one such link, this template is inappropriate. It is instead meant for articles that are fundamentally about a subject that contains spoilers, such as articles about Doctor Who websites.
The most obvious page requiring this template is Doctor Who website.
Careful . . . spoilers!
Clicking on external links in this article will most definitely lead to pages that will spoil details of upcoming episodes of Doctor Who.
