WARNING: This post contains spoilers for The Zygon Invasion. If you wish to remain completely spoiler-free, click away now!
The BBC has released a new preview clip from this Saturday’s episode of Doctor Who, The Zygon Invasion.
You can watch the preview below:
The Zygon Invasion airs on Saturday 31st October at 8:15pm on BBC One and at 9/8c on BBC America.