How to watch Casualty – Lethal Legacy online from anywhere
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Casualty is the world's longest-running primetime medical drama, following the staff and patients of Holby City Hospital's emergency department since September 6th, 1986. Now in its 40th series, the BBC One drama returns with its third and final boxset of the year: "Lethal Legacy."
"Lethal Legacy" premieres on April 25th, 2026, and comprises 12 episodes, released one per week on Saturdays. The boxset picks up directly after the devastating events of "Learning Curve," in which resident doctor Kim Chang (Jasmine Bayes) died following a medical procedure gone wrong, and Faith Cadogan (Kirsty Mitchell) went into labour.
The new boxset centres on a mystery virus that sweeps across Holby, pushing the emergency department to its limits. Key cast members returning for "Lethal Legacy" include Flynn Byron (Olly Rix), Dylan Keogh (William Beck), Stevie Nash (Elinor Lawless), Matty Linlaker (Aron Julius), Cam Mickelthwaite (Barney Walsh), and long-serving Charlie Fairhead (Derek Thompson).
How to watch Casualty "Lethal Legacy" quickly
- In the UK: watch live on BBC One (Saturdays, 8:50pm) or stream for free on BBC iPlayer from 6am on the same day. A TV licence is required.
- In the US: subscribe to BritBox ($10.99/month) or add BritBox as a channel on Amazon Prime Video or Apple TV.
- In Australia: subscribe to BritBox Australia (AU$13.99/month) or watch via the BritBox channel on Apple TV. BritBox is the only official streaming option in Australia.
- In Canada: subscribe to BritBox Canada or add BritBox via Amazon Prime Video or Apple TV.
- Anywhere abroad: use a VPN (we recommend NordVPN) to connect to a UK server and stream for free on BBC iPlayer.
How to watch Casualty for free with a VPN
BBC iPlayer is free to stream in the UK with no subscription required, just a free BBC account. It carries all "Lethal Legacy" episodes and is the only way to watch Casualty at no cost. However, iPlayer is geo-restricted and only works with a UK IP address. If you are traveling or living outside the UK, you need a VPN to access it.
- Choose a VPN. We recommend NordVPN for streaming BBC iPlayer. It operates 9,500+ servers across 149 countries, including UK locations. Our Cybernews researchers recorded 94% download speed retention using the NordLynx protocol, which is well suited to 45-minute HD episodes without buffering.
- Install the VPN app. Download and install NordVPN on your device. It supports Windows, macOS, iOS, Android, Fire TV, and select smart TVs.
- Connect to a UK server. Open the app and select a UK server. Your IP address will appear UK-based to streaming platforms.
- Go to BBC iPlayer. Create a free BBC account if you do not have one, then search for Casualty.
- Start streaming. New "Lethal Legacy" episodes are available from 6 AM every Saturday. Keep your VPN connected throughout your session.
Where to watch Casualty "Lethal Legacy"
| Country | Streaming service | Price |
| United Kingdom | BBC iPlayer | Free (TV licence) |
| United Kingdom | BBC One | Free (TV licence) |
| United States | BritBox | $10.99/month |
| United States | Amazon Prime Video (BritBox add-on) | Varies |
| Australia | BritBox Australia | AU$13.99/month |
| Canada | BritBox Canada | Varies |
| Anywhere | BBC iPlayer | Free |
What devices can you watch Casualty on
BBC iPlayer is available on smart TVs (Samsung, LG, Sony), iOS and Android devices, streaming sticks such as Amazon Fire Stick, Roku, and Chromecast, Apple TV, desktop and laptop browsers, and games consoles such as PlayStation and Xbox. If you use a VPN to access iPlayer from abroad, NordVPN has dedicated apps for most of these devices. On smart TVs that do not support VPN apps natively, you can set up NordVPN via your router or use its Smart DNS feature instead.
BritBox is available on smart TVs, iOS and Android devices, Amazon Fire TV, Roku, Apple TV, and via desktop browsers in the US, Australia, and Canada. No VPN is required for BritBox subscribers in supported regions.
Best VPNs for watching Casualty
If you want to stream Casualty "Lethal Legacy" on BBC iPlayer from outside the UK, these are the three VPNs we recommend. Our Cybernews researchers have tested all three for iPlayer compatibility and streaming performance. For more on how VPNs work for streaming, see our guide on how to change your location with a VPN.
- NordVPN is our top pick for BBC iPlayer. Starting from $3.49/month on a 2-year plan, it gives you access to 9,500+ servers in 149 countries, including UK-based servers that consistently unblock iPlayer. Our Cybernews researchers recorded 94% download speed retention using the NordLynx protocol and download speeds exceeding 853Mbps on UK servers, more than enough for Casualty's 45-minute episodes in HD. Smart DNS is included for compatible TVs, and up to 10 devices are supported simultaneously. A 30-day money-back guarantee applies. Read the full NordVPN review.
- Surfshark is a strong budget option starting from $2.49/month. It offers 4,500+ servers across 100 countries and supports unlimited simultaneous device connections, which makes it a practical choice for households with multiple viewers. Our Cybernews researchers recorded 95% download speed retention and 94% upload speed retention. Surfshark uses the WireGuard protocol for smooth HD streaming and includes a 30-day money-back guarantee. Read the full Surfshark review.
- Proton VPN is a privacy-focused option based in Switzerland, with 20,300+ servers in 148 countries and a premium plan starting from $2.99/month. Our Cybernews researchers recorded speed retention of up to 80%. Proton VPN operates under strict Swiss privacy laws and offers a free tier, though streaming BBC iPlayer requires a paid plan. A 30-day money-back guarantee applies on paid plans. Read the full Proton VPN review.
How to watch Casualty with a VPN - step-by-step guide
Step 1 – Choose a VPN with UK servers
For BBC iPlayer, you need a VPN with reliable UK server coverage and fast enough speeds for HD streaming. NordVPN is our recommended choice based on its consistent track record with iPlayer. Our Cybernews researchers recorded download speeds exceeding 853Mbps on UK servers, well above what a 45-minute HD episode requires. You can find more options in our best VPNs for streaming and best VPN services guides.
Step 2 – Install the VPN on your device
NordVPN supports Windows, macOS, iOS, Android, Amazon Fire TV, and select smart TVs, with apps available from the provider or your device's app store. If you plan to watch on a smart TV that does not support VPN apps natively, setting up NordVPN on your home router will cover all devices on your network. For device-specific guidance, see our best VPN for iPhone, best VPN for Android, and best Windows VPN guides.
Step 3 – Connect to a UK server
Open the NordVPN app and select any UK server from the country list. This assigns you a UK IP address, which is what BBC iPlayer checks to determine your location. If the first server does not load iPlayer, switch to a different UK server. NordVPN has multiple UK options available. Our guide on how to change your location with a VPN explains the process in more detail.
Step 4 – Open BBC iPlayer
Navigate to BBC iPlayer in your browser or via the app. Creating a BBC account is free and only requires an email address. If iPlayer does not recognise your new UK IP address immediately, try opening it in a private browsing window or clearing your browser cookies before refreshing.
Step 5 – Start streaming Casualty
Search for Casualty and open the "Lethal Legacy" boxset. New episodes are available from 6am every Saturday. Keep your VPN connected throughout. If you experience buffering, switch to a different UK server, restart the app, or clear your cache.
Casualty "Lethal Legacy" episode schedule
"Lethal Legacy" comprises 12 episodes, releasing one per week on Saturdays. The boxset does not drop all at once. New episodes follow the weekly broadcast schedule throughout the run.
- BBC One: Saturdays at 8:50 PM, starting April 25th, 2026
- BBC iPlayer: Saturdays from 6 AM, same day as broadcast
- BritBox (US, Australia, Canada): Episodes added shortly after the UK broadcast
The boxset runs from April 25th, 2026, covering episodes 21-32 of Series 40. Each episode runs approximately 45 minutes.
How to watch Casualty in the US
In the US, BritBox is the primary way to watch Casualty "Lethal Legacy." A subscription costs $10.99/month or $109.99/year and gives on-demand access to episodes shortly after their UK broadcast. BritBox is also available as a channel add-on through Amazon Prime Video and Apple TV, which is convenient if you already subscribe to either platform. US viewers can also access BBC iPlayer for free by connecting to a UK server via a VPN.
How to watch Casualty in the UK
Casualty is free to watch in the UK. The show airs live on BBC One every Saturday at 8:50 PM, and all "Lethal Legacy" episodes are available on BBC iPlayer from 6 AM on the same day. A BBC account is free to create and requires only an email address. You must hold a valid UK TV licence to watch legally.
How to watch Casualty in Canada
In Canada, BritBox Canada is the confirmed streaming home for Casualty Series 40. The service is also available as a channel add-on through Amazon Prime Video and Apple TV in Canada. Episodes are added on demand following their UK Saturday broadcast. Viewers who prefer a free option can access BBC iPlayer by connecting to a UK server via a VPN such as NordVPN.
How to watch Casualty in Australia
Australian viewers can stream Casualty "Lethal Legacy" on BritBox Australia, which costs AU$13.99/month or AU$139.99/year. BritBox is the only official streaming platform for Casualty in Australia, with new episodes added every Monday following the UK Saturday broadcast. The service is also accessible as a channel add-on through Apple TV in Australia. BBC iPlayer is available as a free alternative via a VPN with a UK server connection.
What to expect from Casualty "Lethal Legacy"
"Lethal Legacy" arrives at one of the most charged moments in recent Casualty history. The "Learning Curve" boxset ended on April 19th, 2026, with the death of resident doctor Kim Chang (Jasmine Bayes), a loss that leaves the ED team shaken going into the new boxset. Faith Cadogan (Kirsty Mitchell) also went into labour in the finale, setting up a major storyline that carries into "Lethal Legacy."
The central threat is a mystery virus that sweeps across Holby, overwhelming the emergency department and creating chaos for staff and the wider community. The title signals that the consequences of this outbreak will affect the team's personal lives as well as their professional ones. Flynn Byron (Olly Rix), the ED's clinical lead, is expected to be at the centre of the response alongside Dylan Keogh (William Beck) and Stevie Nash (Elinor Lawless).
