Auton Trilogy in order

A straight to video Doctor Who spin off series produced by BBV Productions. It was a sequel to the 1970 serial Spearhead From Space which introduced the Autons/Nestenes. 3 films, 2h 48m in all, in release order.

Auton
1997 · 57 min
In a top-secret UNIT warehouse Dr Sally Arnold is studying a Nestene energy unit with little success. Until she subjects it to cosmic signals that activate it and it awakens several dormant Autons stored in the facility.
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Auton 2: Sentinel
1998 · 58 min
Two years have passed since the Nestene creature vanished from UNIT's top secret Warehouse... Suddenly and without warning the Nestene strikes, once again using Autons as its deadly foot soldiers. As mysterious UNIT operative Lockwood struggles to unearth the Nestene plan, he finds himself drawn to remote Sentinel Island. There, the population have been caught up in a bizarre frenzy of religious activity. Lockwood is joined by Natasha Alexander, a new scientific advisor with her own, sinister agenda. To defeat the Nestene menace they must both face the terrifying power of a creature from before the dawn of Mankind...
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Auton 3: Awakening
1999 · 53 min
The Nestenes have made the final connection.
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Frequently asked questions

What order should I watch Auton Trilogy in?

1. Auton (1997), 2. Auton 2: Sentinel (1998), 3. Auton 3: Awakening (1999).

How long does it take to watch all of Auton Trilogy?

About 2h 48m across 3 released films.

Do any Auton Trilogy films have post-credit scenes?

None are listed on TMDB.