Into the Speed Force

"Into the Speed Force" is the sixteenth episode of the third season of The Flash, and the sixty-second episode overall. It aired on March 14, 2017.

Synopsis
Desperate to stop Savitar and save his friends, Barry turns to the speed force for answers. H.R. gives Jesse some advice.

Trivia

 * HR refers to the Speed Force as a "Negative World", to which Cisco is surprised that Earth Nineteen has Super Mario. They are presumably referring to the Minus World, a level in the very first Mario video game that is often regarded as one of the most well known glitches in video game history.
 * Cisco exclaims "By George, I think he's got it!", closely quoting a line popularized in the 1964 film My Fair Lady.
 * This episode features 6 speedsters, more than in any other episode of the series.
 * As her is Vibing Barry into the Speed Force, Cisco says "to infinity and beyond", the famous catchphrase of the toy space ranger Buzz Lightyear from the Toy Story franchise.
 * HR mistakes the Peanuts character Schroeder with the famous thought experiment Schrödinger's cat. He then remarks how on his Earth it is Charlie Brown that plays the piano.
 * Jesse suggesting that Savitar's shard would find its way back to him, Cisco likened it to the 1999 film The Iron Giant, which ends with the title character's parts pulling themselves together to rebuild him.
 * The Speed Force comments that Jay was getting slow in his "golden age", referencing the period of comics in which Jay originally appeared.