William Hartnell tearfully tells his wife "I don't want to go" after announcing his departure from Doctor Who. These were also the last words spoken by the Tenth Doctor.
When the Doctor is being 'rescued' by the cactus people, who haven't bothered to untie him, he shouts "Worst Rescue Ever!" This is a reference to The Simpsons' Comic Book Guy's catchphrase "Worst *blank* Ever!"