Toilet

A toilet was a device used for the disposal of bodily wastes. A toilet was often found in a room known as a bathroom. Posh people referred to it as the loo. (TV: The Unicorn and the Wasp)

The Tenth Doctor assumed that London in 1599 was "somewhere before the invention of the toilet" after narrowly avoiding being hit by waste being poured out of a window. (TV: The Shakespeare Code)

While visiting Villa Diodati with the Thirteenth Doctor in 1816, Graham O'Brien searched for the lavatory, but discovered that they were too early in history to enjoy the invention of toilets. (TV: The Haunting of Villa Diodati)

During the long, cold winter of 1963, the toilets of Coal Hill Secondary School froze over, and the caretaker was forced to thaw them every morning, even in late March. (PROSE: Time and Relative)

Yvonne Hartman found Julie Jones murdered "on the loo." (AUDIO: One Rule)

Blon Fel-Fotch Passameer-Day Slitheen, in the form of Margaret Blaine, took Cathy Salt to the toilets in order to kill her, after claiming her "little tummy" was "complaining" when she farted loudly. Soon after, when she farted after entering the toilet, Cathy remarked, "Sounds like we got here just in time." When Cathy revealed she was pregnant, Margaret decided to let her go. (TV: Boom Town)

There were no toilets in the base of LINDA, requiring members to use a pub, as Victor Kennedy was reminded when he claimed Mr Skinner gone there. In reality, Victor had absorbed Skinner, and was trying to get rid of Elton and Ursula. (TV: Love & Monsters)

Both Penny Carter and Donna Noble hid in a toilet cubicle for a day, while investigating Adipose Industries. Miss Foster soon discovered someone was spying on her and searched the toilets. She found Penny, but not Donna. (TV: Partners in Crime)

Amy Pond went to ladies' toilets of the White House in 1969 because she wasn't feeling well. She discovered a Silent there, and saw it destroy a woman called Joy. (TV: The Impossible Astronaut)

Airplanes also had toilets. Jack Harkness once visited one after being poisoned by arsenic in his cola. He vomited there. (TV: Rendition)

Sometime before 2013, before falling under the influence of the Great Intelligence, Mahler intended to fix the Shard's toilets. (TV: The Bells of Saint John)

Sometime after 2013, an Ood wandered out of the TARDIS into the Ponds' house after the Eleventh Doctor visited it. Later, Amy Pond and Rory Williams found it on the loo. (WC: Pond Life)

On Rebeeka VI, the TARDIS materialised in the toilets of a small café. (PROSE: It's Only a Game)

Mr Ryan was admitted to a hospital due to his legs being trapped inside a toilet. When his doctor, Rory Williams, attended to him, Rory asked, "Again?" (TV: The Power of Three)

Bill Potts asked where the TARDIS toilet was on her first trip, and the Doctor told her it was "near the macaroon dispenser." (TV: The Pilot)

Information from invalid sources
The Pod was a music festival in Pete's World that was different from all others, as it was broadcast directly to Cybus EarPods and didn't involve "tickets, tents, or dodgy toilets". (NOTVALID: The Pod)