All episodes Season 4 S04E22 1967-02-04 25 min 1960s BBC

Doctor Who

The Underwater Menace, Part Four

TV Flash files “The Underwater Menace, Part Four” as hour 148 of 700 in the TV Flash guide — Doctor Who (1963–) on BBC, season 4, episode 22, aired 1967-02-04, 25 min.

From the desk

How this hour is filed

This leaf is S04E22: listed hour 148 of 700 in the Doctor Who guide, hour 22 of 43 in season 4. It aired 1967-02-04 (25 min). The listed hour before it is “The Underwater Menace, Part Three” (S04E21). Next is “The Moonbase, Part One” (S04E23). Broadcast log — titles and dates, not a plot bible.

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Catalog log

Broadcast listing — not a TV Flash recap.

With Zaroff's plan nearing completion, the Doctor and Ben realise the only way to save the world is to destroy Atlantis.

Viewer FAQ

Where does The Underwater Menace, Part Four sit in the Doctor Who guide?

S04E22 is listed hour 148 of 700 — hour 22 of 43 in season 4, season 4 episode 22.

When did Doctor Who S04E22 air?

The Underwater Menace, Part Four aired 1967-02-04 and is listed at 25 minutes.

Where should I start with the 1960s serials?

William Hartnell's First Doctor is the origin of the TARDIS-and-companions contract. Patrick Troughton's Second Doctor is the proof that regeneration works. Start at a serial whose surviving episodes interest you; missing-episode gaps are part of the classic-era weather.

In the series

Why this series still plays

A Time Lord, a police box bigger on the inside, and regeneration as infinite franchise life: Doctor Who launched from the BBC in 1963 and never really parked. Early black-and-white serials built the mythology; Hartnell-to-Troughton proved the lead could change without ending the show. The longest experiment in serialized reinvention — woolly, weird, endlessly renewable.

November 23, 1963, is a drop that never really parked. BBC's *Doctor Who* launched a Time Lord and a blue police box bigger on the inside, then treated the lead as renewable inventory. **Regeneration is the window.** Sydney Newman, C. E. Webber, and Donald Wilson were among the early architects. Early black-and-white serials built the mythology; companions, sonic screwdrivers, and cliffhangers became ritual. Rex wants woolly national inheritance. Fine. The business model is recasting without ending the show.

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