On this week's bumper Newscast, Adam asks Jeremy Bowen why the tragic explosion in Beirut could have bigger consequences closer to home. With climate change, coronavirus, and China "feeling its oats", we draw up the Newscast Risk Register of national security concerns - with help from former MI6 chief Sir John Sawers, former Home Secretary Jacqui Smith and BBC Security Correspondent Gordon Corera.

Plus - BBC reporters round up the best of the rest of the week's news, and Jamie Bartlett teases us with the return of The Missing Cryptoqueen.

Studio Director: Emma Crowe