Roy Thinnes stars as architect David Vincent, who discovers an alien infiltration and spends two seasons trying to expose ‘The Invaders‘.
Main cast
- David VincentRoy Thinnes1–2Main
Supporting cast
- Edgar ScovilleJames Daly1Supp
- Alan LandersWilliam Windom1Supp
- Katherine ‘Kat’ – a waitress / alien helperDiane Ladd1Supp
- Lt. Richard ‘Dick’ – police officerRobert Walker Jr.1Supp
- Patricia ‘Pat’ – an alien informantAnne Francis1Supp
- Dr. Daniel ‘Dan’ – scientistAlfred Ryder2Supp
- Annie – alien seductressJoanne Linville2Supp
- Marshal – FBI agentKent Smith2Supp
- General – military scepticJohn Crawford2Supp
Guest & voice
- Dr. AndrewRalph Bellamy1Guest
- SarahSuzanne Pleshette1Guest
- ColonelDennis Hopper2Guest
- EvelynDiana Muldaur2Guest
- SheriffWarren Stevens2Guest
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About this cast
The Invaders is a 1960s sci-fi series following architect David Vincent as he uncovers a secret alien invasion and struggles to convince a sceptical world. Roy Thinnes leads the cast as Vincent, supported by a rotating gallery of guest stars playing both human allies and disguised alien foes.
FAQs
Who plays David Vincent in The Invaders?
Roy Thinnes plays the lead role of architect David Vincent in both seasons of The Invaders.
How many seasons of The Invaders are there?
The Invaders ran for two seasons from 1967 to 1968, with a total of 43 episodes.
Is The Invaders set in the UK or the USA?
Although sometimes broadcast on ITV in the UK, the series was produced by ABC (US) and is set in the United States. Its UK airings helped cement its cult status here.
Did The Invaders have any notable guest stars?
Yes, it featured many well-known actors, including Suzanne Pleshette, Dennis Hopper, Diana Muldaur, Ralph Bellamy, and Anne Francis, often as one-off characters or aliens.
Where can I watch The Invaders in the UK?
The series has been released on DVD and occasionally appears on digital platforms. ITV4 has rerun the show in the UK, and it is also available via streaming services like Amazon Prime Video (with subscription).
Sources & where to watch: IMDb · Wikipedia · Where to watch (JustWatch UK) · Updated June 2026