18 June 1938: birth of Michael Sheard, who played Rhos in The Ark (1966), Dr. Roland Summers in The Mind of Evil (1971), Laurence Scarman in Pyramids of Mars (1975), Lowe in The Invisible Enemy (1977), the Mergrave in Castrovalva (1982) and the Headmaster in Remembrance of the Daleks (1988).
18 June 1946: birth of Luan Peters (also known as Karol Keyes), who played Chicki in The Macra Terror (1967) and Sheila in Frontier in Space (1973).
18 June 1973: death of Roger Delgado in a car accident in Turkey; he had played the original Master from 1971-73.
18 June 1991: death of Ronald Allen, who played Rago in The Dominators (1968) and Ralph Cornish in The Ambassadors of Death (1970).
18 June 2004: death of Frederick Jaeger, who played Jano in The Savages (1966), Professor Sorenson in Planet of Evil (1975), and Professor Marius in The Invisible Enemy (1977).
ii) broadcast anniversaries
18 June 1966: broadcast of fourth episode of The SavagesThe Parting of the Ways, ending the first season of New Who; last appearance of Christopher Eccleston as the Ninth Doctor. The Doctor tries to send Rose back to her own time, but she manages to gain the energy from the Tardis, which she and the Doctor use to destroy the Daleks – at the cost of the Doctor’s ninth incarnation.
Are you rereading your original copy, or a copy of the ‘preferred text’? The latter is a considerably richer work.