Grylls entered television work with an appearance in an advertisement for Sure deodorant, featuring his ascent of Mount Everest. Grylls was also used by the UK Ministry of Defence to head the Army's anti-drugs TV campaign, and featured in the first ever major advertising campaign for Harrods. Grylls has been a guest on numerous talk shows including "Friday Night with Jonathan Ross", "The Oprah Winfrey Show", "Late Night with Conan O'Brien", "The Tonight Show with Jay Leno", "Attack of the Show!", "Late Show with David Letterman", "Jimmy Kimmel Live!" and "Harry Hill's TV Burp". Grylls recorded two advertisements for Post's Trail Mix Crunch Cereal, which aired in the US from January 2009. He also appeared as a "distinguished instructor" in Dos Equis' "Most Interesting Academy" in a webisode named "Survival in the Modern Era". He appeared in a five-part web series that demonstrates urban survival techniques and features Grylls going from bush to bash. He also has marketed the Alpha Course, a course on the basics of the Christian faith. In 2013, Grylls appeared in an airline safety video for Air New Zealand entitled "Bear Essentials of Safety", filmed against the backdrop of the Routeburn Track on the southern tip of New Zealand's South Island. In 2014, Grylls appeared on "Piers Morgan's Life Stories".