John Steed
From Tardis Wiki, the free Doctor Who reference
John Steed visited Bonjaxx's birthday party at Maruthea. He participated in the bar fight started by a Meep. As the Seventh Doctor left Maruthea with Ace, he fought Captain Britain with Emma Peel. (COMIC: Party Animals)
In 1968, when Iris Wildthyme and Panda took a plane from Croydon Airport, John Steed saw them off. (PROSE: Riviera Shakedown)
When the Eleventh Doctor visited 1963 with Amy Pond, he mentioned John Steed as one of the people that made the 1960s "cool". (GAME: City of the Daleks)