The final is tomorrow 05h30. He said he wants to break his 19.19s record. This means running half a second faster than his time in the semis. De Grasse could provide some motivation. Bolt will of course be in action at 18h48 today in round 1 of the 100m relay (the final is at 05h35 on Saturday).
You also don't want to miss the Badminton singles semis which starts at 18h00 when Sindhu will try to earn the second medal of a billion-people nation. While the US will be facing Serbia at 20h00 in one of the two women volleyballs semis. If you like women wrestling today is the day you want to be glued to your TV. Tomorrow if you also like men wrestling.
Of course as these Olympics are ending in the weekend there will be a lot of medals awarded in the next 2-3 days. Hopefully Brazil will win as many as possible so that the home crowd is in the best of moods. Like at 00h30 on Sunday when the Selecao play in the Maracana. And get a chance to get even.