EXPLANATION When we are writing down the actual words spoken by someone, we place these words in inverted commas. This is called direct speech. The first of the corrected forms above contains direct speech - what the Martian actually said.
If we report what someone has said by using our own words and not exactly the same words the speaker used, we do not use inverted commas. This is called reported speech or indirect speech. The second Correction above is an example of reported speech. Notice the word that; it is generally used as a lead-in to reported speech.
While direct speech must always contain the exact words used by a speaker, the words in reported speech may vary. For example, if what is said is reported immediately after it is said, then a word such as tomorrow will still be tomorrow; but if the speech is reported a few days later, tomorrow will obviously have to be changed to the next day, for with the passing of each day, tomorrow refers to a different day. Pronouns change too: compare the use of I and he in the corrected forms above.