Final answer:
The correct punctuation for the given sentence is "Yesterday, I saw a programme on Dr. Stephen Hawking on BBC." Additionally, when punctuating quotations, brackets indicate changes made for clarity or grammar in the original text.
Step-by-step explanation:
The correct punctuation for the sentence you mentioned should be: "Yesterday, I saw a programme on Dr. Stephen Hawking on BBC." The sentence needs a comma after 'Yesterday' to indicate a pause, and 'Dr.' should be followed by a period as it's an abbreviation.
Also, the sentence starts with a capital 'Y' for 'Yesterday,' and programme is spelled the American way 'program' unless you are using British English.When it comes to quoting something, proper punctuation is essential. For example, suppose you're citing Antony Hewish's BBC interview about Death of Stars.
In that case, you might write, "According to Antony Hewish's insights on BBC, '[t]he death of stars is a complex process.'" Notice the brackets show that you have changed the original quote for clarity or grammar while maintaining its meaning.