The man behind the Magnitsky Act on Trump, hybrid warfare and fighting the Kremlin.

Sir William Browder is an American investor who made a fortune in post-Soviet Russia before falling foul of Vladimir Putin.

He鈥檚 now a fierce critic of President Vladimir Putin - and today he鈥檚 in the Ukrainecast studio to discuss why the rouble is tanking, what it鈥檚 like to draw the ire of the Russian president and whether an end to the war is near.

Today鈥檚 episode is presented by Jamie Coomarasamy and Frank Gardner.

The producers were Arsenii Sokolov and Ben Carter. The technical producer was Dan Ehrlich. The series producer is Tim Walklate. The senior news editor is Sara Wadeson.

Email Ukrainecast@bbc.co.uk with your questions and comments. You can also send us a message or voice note via WhatsApp, Signal or Telegram to +44 330 1239480

You can join the Ukrainecast discussion on Newscast鈥檚 Discord server here: tinyurl.com/ukrainecastdiscord