Batman

Batman was a costumed comic-book hero on Earth.

During a visit to 1880s London the Fourth Doctor, when turning out his pockets, produced odds and ends including a toy Batmobile. (TV: The Talons of Weng-Chiang)

During a visit to 1963 Shoreditch, Ace was wearing a Batman earring in her left ear. (TV: Remembrance of the Daleks)

In the 1970s at the Inferno Project, when Greg Sutton expressed surprise at the appearance of the Third Doctor's TARDIS console, the Doctor sarcastically asked Sutton whether he'd expected "some kind of space rocket with Batman at the controls" instead. (TV: Inferno)

Stuart Hyde playfully called Dr. Ruth Ingram "Batman". (TV: The Time Monster)

In the far future, Miranda Dawkins occasionally wore a Batman T-shirt. (Miranda)

Clyde Langer jokingly referred to Sarah Jane's attic at 13 Bannerman Road as "the Batcave", after Batman's secret base of operations. (TV: Sky)

Upon completing his own superhero comic book, The Silver Bullet, Clyde declared, "Step aside, Batman!" (TV: The Curse of Clyde Langer)

Behind the scenes

 * David Tennant has expressed interest in playing the Riddler in a future Batman film.
 * Tim Curry, who played several roles in Batman: The Animated Series, was considered for both the Eighth Doctor and the Master in the 1996 TV movie. He was also considered for the role of Sharaz Jek in the 1984 story The Caves of Androzani.
 * Robert Englund, who played the Riddler in The Batman, was considered for the role of the Master in the 1996 TV movie.
 * At a charity stage show in Hollywood, Matt Smith played a spoof Batman in Gotham Autopsy, a comedy sketch written the night before.
 * A persistent rumour states that Jim Carrey, who played the Riddler in Batman Forever, turned down the role of the Eighth Doctor as he had never heard of Doctor Who and thought it would cause outrage amongst fans if the role were played by a non-fan.