"Dragon Ball Super" episode 51 is entitled "Feelings that Transcend Time - Trunks and Mai." It will focus on the two characters as well as Black Goku's return to the future.

Yibada reported that Mai was revealed to be alive in the last part of "Dragon Ball Super" episode 50. Black Goku is ecstatic after he destroyed Future Trunks' time machine since no one can stop him from wiping out the Earthlings in the future.

Trunks, Goku, Vegeta, Bulma and the other Z-fighters try to figure how to go back to the future and fight the villain. Bulma remembers that she has a capsule that will become Cell's time machine.

However, there are speculations that Cell's time machine may not be useful for the Z-fighters. Apparently, the device can only go to Cell's future and not any other timeline.

One fan took to Twitter to share his thoughts on the dilemma. "People have this idea that Cell's time machine should only be able to go to Cell's future, but that's never been said in the series," Herms98 tweeted.

The "Dragon Ball Super" episode 51 trailer opened with Black Goku's return to the future. He is seen to be wreaking havoc in the timeline without any obstacles.

In one scene, he is shown to be flying above the city and throwing a yellow energy ball down. The upcoming installment would feature the villain finding Mai.

According to IBT, "Dragon Ball Super" episode 51 will showcase how concerned Future Trunks is and how he wants to save the people in his timeline from Black Goku. They will need to hurry up and get to the future to defeat the villain as soon as possible.

"Dragon Ball Super" episode 51 will be aired on Sunday, Jul. 10, 2016. It will be shown on Fuji TV at 9 a.m. Japan time.

It was revealed in "Dragon Ball Super" episode 50 that Black Goku's special ring may be the key to his ability to travel through time. The villain and Goku fought in this week's installment.