All episodes Season 21 S21E20 1984-03-16 25 min 1960s BBC

Doctor Who

The Caves of Androzani, Part Four

TV Flash files “The Caves of Androzani, Part Four” as hour 627 of 700 in the TV Flash guide — Doctor Who (1963–) on BBC, season 21, episode 20, aired 1984-03-16, 25 min.

From the desk

How this hour is filed

This leaf is S21E20: listed hour 627 of 700 in the Doctor Who guide, hour 20 of 24 in season 21. It aired 1984-03-16 (25 min). The listed hour before it is “The Caves of Androzani, Part Three” (S21E19). Next is “The Twin Dilemma, Part One” (S21E21). Broadcast log — titles and dates, not a plot bible.

Doctor Who — The Caves of Androzani, Part Four (S21E20)

Catalog log

Broadcast listing — not a TV Flash recap.

Chellak and his men attack Jek's base. The Dr. crash-lands the ship, and must escape from his captors to find the antidote to the Spectrox poisoning and save Peri. He does so, but at a staggering cost.

Viewer FAQ

Where does The Caves of Androzani, Part Four sit in the Doctor Who guide?

S21E20 is listed hour 627 of 700 — hour 20 of 24 in season 21, season 21 episode 20.

When did Doctor Who S21E20 air?

The Caves of Androzani, Part Four aired 1984-03-16 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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Also in season 21

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