In fifteenth episode of "The Flash" season two, "Arrow's" John Diggle (David Ramsey) and wife Lyla Michaels (Audrey Marie Anderson) will join Team Flash in pursuit of King Shark, who has escaped A.R.G.U.S.
"The Diggles arrive in Central City to help Barry take on King Shark, who has escaped from ARGUS and is hellbent on completing his mission of destroying The Flash," executive producer Andrew Kreisberg told ComicBook.com.
The news comes on the heels of an Instagram post from Ramsey, which showed him standing outside "The Flash's" writers' room. "Can only mean one thing," he wrote at the time, heralding his return to Central City. However, it looks like his guest starring role will only last as long as one episode.
Starring Grant Gustin, Jesse L. Martin and Carlos Valdes, "The Flash" returns to The CW at 8 pm EST on January 19. Starring Stephen Amell, Neal McDonough, David Ramsey and Emily Bett Rickards, "Arrow" returns to The CW on Wednesday, January 20 at 8/7C.