The fourth episode of the season is loaded with two interviews: Toby Landau QC talks about the fallacy of witness evidence in arbitration. Based on his 2010 Kaplan Lecture, he argues that the way we produce and examine witnesses has some inherent flaws [TIME 08:18]. We then interview academic and in-house counsel Cornel Marian about taxation in international (investment) arbitration, a topic on which he has just published a book [TIME 45:16]. The third and more casual segment is about English-centrism, prompted by a recent blog post [TIME 01:21:51].