Vernon Scripps' past catches up with him. Igor Saukas from Lithuania is captain on a coaster which makes a call at Whitby. Saukas uses the opportunity to call on his old friend, but Scripps is not too keen on seeing Saukas because of a deal involving faulty umbrellas and now Vernon is convinced that the Lithuanian is out for revenge. Much too his surprised Saukas instead offers him another deal - Lithuanian peat. Clive Denby from MI5 is also very interested in the Lithuanian. He asks sergeant Craddock to assist in the surveillance of him. Eamon Maxwell insists that something is wrong with him although Dr Summerbee's examinations show him to be in good health. Every time she has put his mind at ease he comes up with a new "disease". He may even have a death wish, because he often stands on the railway tracks and jumps aside at the very last moment.