Last week on "The Flash," Savitar cruelly tricked Wally West into exchanging places with him in the speed force. This week, on "Into the Speed Force," Barry re-entered the speed force to find Wally. While there, he was met with three different dead friends: Ronnie Raymond, Eddie Thawne, and Leonard Snart. Each of these friends were actually avatars of the speed force itself, each with a specific message for Barry. Outside of the speed force, Iris wondered if she should accept Barry's proposal and Jesse tried to take on Savitar by herself. This episode marked a turning point in "The Flash" Season 3 as Jesse, Barry, and Jay Garrick made decisions that will not be easily undone. Team Flash also found a weakness in Savitar that will hopefully lead to his quick demise.

Ghosts of Speed Force Past

The first person that Barry met inside the speed force was Eddie Thawne. Eddie had killed himself in the Season 1 finale to stop Eobard Thawne from ever existing. His sacrifice was heroic and marked the death of both a great police detective and Iris' first fiance. Eddie's speed force ghost explained to Barry that it was time for him to stop messing with the past and the future. He said that the speed force had allowed him to save his mother (which created Flashpoint,) but that enough was enough. He then unleashed a speed wraith on Barry, which looked like the Season 2 villain, Hunter Zolomon/Zoom. Barry escaped from Zoom and found the speed force ghost of Ronnie Raymond. Ronnie tried to convince Barry that he was always letting other people make the sacrifice play for him. This challenged how Barry thought of himself as a hero, so he offered to stay in Wally's place. The speed force wouldn't allow this though and told him that he had to save Iris' life in the future.

Jay's Sacrifice

When the Zoom wraith found Barry again, Barry used his tracking device to destroy him. Barry then found Wally, but the speed force stopped him from talking to Wally through the ghost of Leonard Snart. Leonard told Barry that he made the sacrifice play for his team of Legends because he was inspired by Barry. Barry then tried to talk to Wally again, so Snart blasted him with his cold gun. Jay Garrick showed up just in time to save Barry from Snart's deadly cold gun. Barry then spoke to Wally, who was reliving the death of his mother over and over again (sound familiar?) Barry was intent on taking Wally's place, until Jay offered to do it. It was an emotional scene -- Jay gave Barry his helmet -- his tracking device and said that he had finished his race.

Can Heroes Keep Love?

Barry and Wally successfully made it out of the speed force and both returned changed men. Wally had learned the valuable lesson of not going against Savitar alone. While he was in the speed force his girlfriend, Earth-2 Flash Jesse Quick, did not learn that lesson. Against all precautions, she tracked Savitar down alone. She landed a crucial blow to his body, but she also learned that he had plans for her. When Wally and Jesse reunited, Jesse told Wally that she was going to Earth-3 to take Jay's place. She wanted to avoid Savitar's plans for her, so she left. When Barry got back, he had learned that he and he alone had to stop Savitar from killing Iris in the future. While Iris was ready to take the next step with Barry and be his wife, Barry strangely put distance between them. He told Iris to keep the apartment and that he would move back to Cisco's -- wait what?

No Longer a God

The Flash Savitar

Both Jesse's departure and Barry's change of heart felt out of place for the episode. Jesse had just decided to leave her dad to stay on Earth-1 and now she's moving to Earth-3. As speedsters go, it seems like she just can't get a lock on where she wants to be. Perhaps she'll return to Wally and Earth-1 when Savitar is gone. Barry's decision to lie to Iris about why he proposed also felt very out of character. First, he pulled Iris closer, now he's pushing her away. Does he think he can save her if they aren't together? Iris and Joe had a very heartfelt moment in the future room about her missing article attribution. It seems like everyone is scared of the future Barry saw -- the future that perhaps Savitar wanted him to see. Lastly, when Jesse stabbed Savitar, she realized that he was no god -- he was a man covered in a suit of armor. Who's under that armor? Future Barry? Future Wally? Future Jay? Hopefully, it isn't anyone we know, but a mask on a superhero show usually means one thing: that we've already met the villain. What are some of your Savitar theories? Do you think Barry and Jesse are crazy for pushing Iris and Wally away?

Enter the Music Meister

Next week, Barry and Team Flash will be visited by Earth-38's Supergirl and friends. When Kara is trapped inside of a musically-induced coma, Barry will have to rescue her. The episode will be a "Glee" reunion for Melissa Benoist, Grant Gustin, and Darren Criss, who all previously starred on the Fox drama together.

DARREN CRISS (“GLEE”) GUEST STARS AS THE MUSIC MEISTER IN THE FLASH AND SUPERGIRL MUSICAL CROSSOVER – Barry (Grant Gustin) and team are surprised when Mon-El (guest star Chris Wood) and Hank Henshaw (guest star David Harewood) arrive on their Earth carrying a comatose Supergirl (guest star Melissa Benoist) who was whammied by the Music Meister (guest star Darren Criss). Unable to wake her up, they turn to Team Flash to save her. However, the Music Meister surprises The Flash and puts him in a similar coma, one that Team Flash can’t cure. Kara and Barry wake up without their powers in an alternate reality where life is like a musical and the only way to escape is by following the script, complete with singing and dancing, to the end. Dermott Downs directed the episode with story by Greg Berlanti & Andrew Kreisberg and teleplay by Aaron Helbing & Todd Helbing. Original airdate 3/21/2017.

“The Flash” and “Supergirl” musical crossover will start with a lead-in scene on the March 20 episode of “Supergirl,” and continue in full on the March 21 episode of “The Flash.” The episode will include musical numbers from “The Flash” stars Grant Gustin, Jesse L. Martin and Carlos Valdes; “Supergirl” stars Melissa Benoist and Jeremy Jordan; and “Legends of Tomorrow” co-star Victor Garber and “Arrow” regular John Barrowman; along with “Glee” alum Darren Criss as the Music Meister, the episode’s antagonist.