What is the name of the time machine in 'Doctor Who'?

In 'Star Trek', what is the name of the starship commanded by Captain Kirk? Who played Captain James T. Kirk in the original 'Star Trek' series? Who played Spock in the original 'Star Trek' series? Who played Captain Jean-Luc Picard in 'Star Trek: The Next Generation'? Which streaming service launched 'The Mandalorian' in 2019? In 'The Big Bang Theory', in which city do the characters live? In 'The Big Bang Theory', which character says "Bazinga!"? Who played Sheldon Cooper in 'The Big Bang Theory'?