Start the WeekAlien InvadersBBC Radio 4 Duration: 43 minutesFirst broadcast: Mon 19th May 2014, 09:00 on BBC Radio 4 FMLatest broadcast: Mon 19th May 2014, 21:30 on BBC Radio 4 LWAvailable for over a yearListen nowAnne McElvoy discusses alien species with scientists Ken Thompson, Monique Simmonds and Victoria Herridge and farmer John Lewis-Stempel. Show more ContributorsPresenter:Anne McElvoyInterviewed Guest:Ken ThompsonInterviewed Guest:Monique SimmondsInterviewed Guest:Victoria HerridgeInterviewed Guest:John Lewis-StempelProducer:Katy HickmanGenresFactualArts, Culture & the MediaFormatsDiscussion & TalkBrandStart the Week Source: BBC Online