Also, Rash Masum (Neet Mohan) received some really positive news, as he learnt that he had finally become a consultant! Here’s everything you need to know on why Casualty is not on TV and when it’s back. Why is Casualty not on tonight and when is it back? Casualty has finished its Lethal Legacy boxset and thus it is currently off air – and won’t return to our TVs until the start of September. If you’ve got a soap or TV story, video or pictures get in touch by emailing us soaps@metro.co.uk – we’d love to hear from you.