22 July 1936: birth of Roy Herrick, who was the counter-revolutionary Jean in the story we now call The Reign of Terror (First Doctor, 1964) and Parsons, a space medic in The Invisible Enemy (Fourth Doctor, 1977)
22 July 1937: birth of Adrienne Hill, who played the short-lived Katarina, a companion of the First Doctor, in the last episode of The Myth Makers and the first few episodes of The Daleks' Master Plan in 1965.
22 July 1964: birth of Bonnie Langford, who played Melanie Bush in 1986-87 alongside the Sixth and Seventh Doctors.
They are not the only two Doctor Who regulars to share the same birthday - more on that come August and October.
22 July 1977: death of Eric Chitty, who was Charles Preslin in the 1966 First Doctor story we now know as The Massacre (lost, alas) and Co-ordinator Engin in The Deadly Assassin (Fourth Doctor, 1976).
ii) broadcast anniversaries
22 July 2011: first broadcast of Dead of Night, third episode of Torchwood series 4. A new cult called the Soulless is formed, and Oswald Danes becomes more and more popular.
iii) date specified in-universe:
22 July 1912: birth of John Forester, as seen in The Gathering (Torchwood, 2011).