“"Marathon" deals with the fallout of Crisis while setting up the second half of the season... it manages to be more gripping and heartfelt than that boring, anticlimactic waste of a crossover was.” Geeks + Gamers · 6 years ago
The episode excels at managing the somber aftereffects of the multiverse-shattering crossover. It avoids a jarring jump into lightheartedness, opting instead for a "glum exploration" of Team Flash's survivor's guilt and identity crises. [S6E10] Marathon
Critics noted the introduction of a "spiffy new title sequence" and praised the show's improved tone management. While some viewers found the episode "boring" or "basic" due to its slower pace compared to the crossover, others appreciated its "intriguing and emotional" focus on character development over spectacle. Community Perspectives “"Marathon" deals with the fallout of Crisis while
: The episode concludes with a striking cliffhanger: Iris is pulled into a mirror by silver arms, signaling the arrival of a new iteration of Mirror Master. Visuals & Tone Critics noted the introduction of a "spiffy new
Reviewers and viewers highlighting the emotional weight and thematic depth of the episode: