Keiynan Lonsdale Returns to 'The Flash' as Wally West (PHOTOS)

Meredith Jacobs

Keiynan Lonsdale is back on The Flash in the March 10 episode — but not just for a West family reunion.

In "Death of the Speed Force," Wally returns with a Zen attitude and new tricks, and he confides in Barry (Grant Gustin) that he thinks something's wrong with the speed force. In fact, in the promo (below), he fears, "the speed force is beyond repair."

'The Flash' Showrunner Sets Up Season 6's New Graphic Novel Arc

'The Flash' Showrunner Sets Up Season 6's New Graphic Novel Arc

EP Eric Wallace also promises a 'crazy' ride for West-Allen in the season's second half.

Wally returns "to help Team Flash against a familiar threat... but one with a very new face," showrunner Eric Wallace revealed when TV Insider reported Lonsdale's return. Expect to see "a fresher, more exciting direction for the character as Wally — just like the rest of Team Flash — deals with a post-Crisis world," he added.

Also in this episode, Cisco (Carlos Valdes) returns from his fact-finding mission across Earth-Prime.

Click through the gallery above for a look at both those returns and more.

The Flash, Tuesdays, 8/7c, The CW