A secret hookup, the end of the Vacation Alliance, a surprise appearance from TJ — this reunion special had it all.Warning: This article contains spoilers for The Challenge: Battle of the Eras reunion part 2.

The contestants return for a reunion to discuss unresolved issues in the second part of "The Challenge: Battle of the Eras" reunion airing tonight.

The Challenge 40: Battle of the Eras has one more night of drama in store when the Reunion, Part 2 (Episode 21) airs on Wednesday, January 22 at 8 p.m. ET. But the season’s controversies may well continue past that, including debate over who really deserved the win at TJ’s final. STREAM: The Challenge: Battle of the Eras on Philo (free trial).

Battle of the Eras," the 40th season of MTV's long-running "The Challenge," is airing its second reunion episode on Wednesday, Jan. 22 at 8 p.m. There are several ways to watch with a free live stream.