After a break of almost two years, comfy comedy drama Doc Martin makes a welcome return to the ITV schedules this weekend for its fourth series. Following his wedding day disaster with Louisa, Martin is now focused on leaving Portwenn and returning to his job as a top class surgeon in London. But will he be able to conquer his fear of blood first? And will a pretty large obstacle affect his plans? We sat down with Martin Clunes for a wee chinwag to find out more.