'Arrow's David Ramsey Drops by 'The Flash' for First Post-Crisis Episode (PHOTOS)

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Marathon
Katie Yu/The CW
Marathon
Katie Yu/The CW

Cisco (Carlos Valdes), Kamilla (Victoria Park), Allegra (Kayla Compton), and Iris (Candice Patton)

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Katie Yu/The CW

What are they showing Cisco?

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Katie Yu/The CW

Cisco

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Katie Yu/The CW

What has Nash (Tom Cavanagh) done now?

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Katie Yu/The CW

Nash, Allegra, and Cisco

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Katie Yu/The CW

You’re going to want to read the board. It looks like they’re coming up with a timeline of events in this new post-Crisis world.

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Katie Yu/The CW

Iris and Joe (Jesse L. Martin)

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Katie Yu/The CW

How did Iris get hurt?

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Katie Yu/The CW

What has Iris smiling?

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Katie Yu/The CW

Iris and Diggle (David Ramsey)

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Katie Yu/The CW

Barry (Grant Gustin) looks puzzled.

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Katie Yu/The CW

Is something calling Iris away?

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Katie Yu/The CW

What brings Diggle to Central City?

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Katie Yu/The CW

Diggle and Barry

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Katie Yu/The CW

Barry and Iris

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Arrow fans won't have to say goodbye to David Ramsey's John Diggle when the series airs its finale on January 28, because he'll be popping up in The Flash's first post-"Crisis on Infinite Earths" episode airing February 4.

In "Marathon," Iris' (Candice Patton) life is threatened after the Citizen prints an explosive story. But she refuses to hide from those attacking her and sets out to expose a dangerous organization. But as the photos show, it looks like she ends up in some trouble.

We Have Questions! Marc Guggenheim on the 'Crisis' Cameo & CasualtySee Also

We Have Questions! Marc Guggenheim on the 'Crisis' Cameo & Casualty

The EP talks last night's big death (why now?!), how that cameo came to be, and what's in store for Emily Bett Rickards' return.

Meanwhile, Barry (Grant Gustin) has to face the consequences of Crisis and fulfill Oliver Queen's wish for him. What better time for Diggle to pay Central City a visit?

Click through the gallery above for a look at Ramsey's guest spot and more.

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