Do I need to watch earlier episodes before “The Witch of the Waterfall”?

Watching earlier episodes in season 1 helps you follow the plot and character arcs leading into this episode.

Watch The War Between the Land and the Sea Season 1 Episode 4 Online

Q: Where can I watch “The War Between the Land and the Sea” Season 1 Episode 4 online?

This page provides episode info and a legal-only guide. It does not host streams or downloads. Check official platforms and licensed services for availability in your region (US first).

“The Witch of the Waterfall” — Watch "The War Between the Land and the Sea" Season 1 Episode 4 online in HD for free. Check streaming providers, cast, and episode details.

Dec 14, 2025 Season 1 Episode 4 46 min

5.4 ★ ★ ★ ★ ★

25 votes

The War Between the Land and the Sea Season 1

← Back TV Series

Where can I watch "The Witch of the Waterfall" online?

You can watch it through the button below, and it is free.

▶ Watch This Episode Now

Season 1 Episode 4 — Aired on Dec 14, 2025 • runs about 46 minutes.

Directed by Dylan Holmes Williams.

Written by Pete McTighe, Russell T Davies.

Notable cast/guest names in this episode include Russell Tovey, Gugu Mbatha-Raw, Jemma Redgrave, Ruth Madeley.

This page includes 2 official still(s) (when available) plus legal availability links.

Looking for “watch The War Between the Land and the Sea Season 1 Episode 4 online”? This is a legal-only guide with synopsis, stills, and navigation for this season.

Synopsis

Barclay and Salt go on the run in a war-torn London as UNIT reels from disaster. But when Tide threatens the land and Gunsberg advances his plans, the Severance schemes demand blood.