On the Trail of Mark TwainWith Sir Peter Ustinov: Such a Wonderful Thing -- Vol. 4 is the final episode in a four-part PBS travel documentary series. The 60-minute program features actor and journalist Peter Ustinov traveling to Mauritius and South Africa. Highlights include a journey from Victoria to Capetown on the Blue Train, tours of a shantytown and a white Afrikaner community, and a visit with Nelson Mandela. Other tapes in the series include: On the Trail of Mark Twain With Sir Peter Ustinov: Isles of Paradise -- Vol. 1, On the Trail of Mark Twain With Sir Peter Ustinov: Beautiful Death -- Vol. 2, and On the Trail of Mark Twain With Sir Peter Ustinov: A Riddle at Every Turn -- Vol. 3.