Tiger

Tigers were large predatory cats. They died out on Earth in 2148. (PROSE: St Anthony's Fire)

Earth tigers
The Tribe of Gum had to defend themselves from tigers, amongst other animals. (TV: An Unearthly Child)

In 120 AD, the Tenth Doctor found himself opposing lions, tigers and bears in the Flavian Amphitheatre. At one point, a tiger ran towards him, but he neatly jumped over it, and the tiger went on to maul its trainers, who had badly mistreated it. (PROSE: The Stone Rose)

Among the prizes that the First Doctor obtained during a game of backgammon against Kublai Khan in 1289 were twenty-five tigers. (TV: "Assassin at Peking")

In England in the 1920s, Nyssa and Tegan Jovanka were cornered by a tiger in a fairground menagerie but managed to escape unharmed. (AUDIO: Smoke and Mirrors)

In New York City in the 1960s, tigers were among the zoo animals released by a mad scientist. (COMIC: The Monsters from the Past)

In 1970s London, a tiger was kept in a cramped cage in a zoo which was visited by the Third Doctor and the Brigadier's godson Albert. The young boy used the TARDIS dematerialisation circuit to transport himself into the tiger's cage, but the animal caught his hand in its mouth. The Doctor instructed Albert how to use the circuit to free himself, then later donated his UNIT expenses to pay for a larger enclosure for the tiger. However, the tiger merely continued pacing the perimeter of its old cage, its mind having broken under the stress of captivity. (AUDIO: Walls of Confinement)

In November 1988, when the Seventh Doctor and Ace visited Windsor Castle, there was a stuffed tiger head in the basement. (TV: Silver Nemesis)

The zoo that Martha Jones visited when she was young had a tiger that always slept. (PROSE: The Last Dodo)

A tiger escaped from London Zoo in the early 21st century after a global forest grew overnight. It came across Clara Oswald and Maebh Arden while roaming this new habitat but was scared away by Danny Pink's use of a torch - flickering the light across the tiger's eyes. (TV: In the Forest of the Night)

Ace mentioned she was upset there were no tigers in the first circus she went to. (TV: The Greatest Show in the Galaxy)

The Fourth Doctor was fond of tigers. (AUDIO: The Circus of Doom)

During the Twelfth Doctor's time at St Luke's University watching over in the Vault, Missy included a tiger on a list of requests sent to Nardole. The Doctor initially approved the list, but then retracted his approval of the tiger as it "wouldn't be fair" on the animal. However, Nardole had already ordered it. Andromeda.gal.ax delivered a Siberian tiger before processing Nardole's refund, requesting the item be teleported in unused condition to one of their depots. The delivery company erroneously assumed that a group of chickens belonging to university chaplain D. Thorne were acceptable receivers of the tiger, which subsequently ate the birds. Andromeda.gal.ax blamed the incident on the chickens, saying it was their responsibility to put up a sign saying they did not want tigers teleported into their domicile, and replaced them with robotic models equipped with laser eyes and guns which killed Thorne. (PROSE: Girl Power!)

Tigers went extinct before 2148, though their bones were sometimes preserved and saved. (PROSE: St Anthony's Fire)

A tiger was one of the animals on board the Ark in circa 10,000,000. The First Doctor, Steven Taylor and Dodo Chaplet encountered it, and were surprised to find that it was not aggressive. (PROSE: The Ark)

Breeds
Amongst the known breeds of tiger on Earth were sabre-toothed tigers (which became extinct in circa 9000 BC), Siberian tigers, Malayan tigers, and Bengal tigers. (PROSE: The Eight Doctors, PROSE: The Last Dodo, PROSE: Pack Animals)

Many kinds of tiger were known for having stripy fur. According to the Eleventh Doctor, their skin was also stripy. (COMIC: Quite Interesting)

Extra-terrestrial tigers
Despite similar appearances, the tigers of Earth were unrelated to the Hitchemus Tigers. (PROSE: The Year of Intelligent Tigers)

There were at least two species of shapeshifting tiger-like species: a species represented by Lady Huntingdon and her granddaughter (PROSE: Old Flames) and the Tygers. (PROSE: The Eye of the Tyger) The Khamirae Gideon changed into a tiger-like humanoid. (COMIC: Universal Monsters)

Depictions of Tigers
In 1959, the Shangri-La resort in Wales featured two fibreglass tigers and a bear on the front lawn. (TV: Delta and the Bannermen)

Other references
Doctor Ninestein was sometimes referred to by the nickname "Tiger", such as by Mary Falconer. (WC: )