The Flash season 1, episode 18, “All Star Team Up,” airs tonight, as Arrow‘s Felicity Smoak and Ray Palmer arrive in Central City.

Previously

Mark Hamill reprised his role from the original Flash series as James Jesse, the Trickster. Joe and Barry also brought Eddie in on the secret of Barry’s identity so he could run interference with Iris and help them investigate Wells.

Meanwhile, flashbacks revealed that Harrison Wells was not the original Reverse Flash. In fact, the real Eobard Thawne, after killing Nora Allen, discovered he was unable to travel back to the future. In order to get back to his own time, he caused a car accident that killed Tess, Wells’ wife. He then stole Wells’ appearance and killed him in order to expedite the launch of the particle accelerator.

Read our recap for The Flash season 1, episode 17, “Tricksters,” here.

Related: The Flash season 1, episode 17 postmortem

Watch a promo

Producer’s preview

‘The Flash’ season 1, episode 18, ‘All Star Team Up’ synopsis

If that promo has whet your appetite, make sure to read the official synopsis for the 18th episode of the season:

“ARROW’S FELICITY SMOAK (EMILY BETT RICKARDS) AND RAY PALMER (BRANDON ROUTH) ARRIVE IN CENTRAL CITY; EMILY KINNEY (“The Walking Dead”) GUETS STARS AS BRIE LARVIN — Barry (Grant Gustin) is surprised when Felicity Smoak (guest star Emily Bett Rickards) arrives from Starling City along with her boyfriend, Ray Palmer (guest star Brandon Routh), who flies in as the Atom. They’ve come to visit S.T.A.R. Labs as Ray needs help with his suit.

“Their timing turns out to be fortuitous because it’s all hands on deck after a meta human named Brie Larvin (guest star Emily Kinney) unleashes hundreds of robotic bees to attack and kill her former co-workers, including Dr. Tina McGee (guest star Amanda Pays). A group dinner with Barry, Felicity, Ray, Iris (Candice Patton) and Eddie (Rick Cosnett) turns into a disaster. Kevin Tancharoen directed the episode written by Grainne Godfree & Kai Yu Wu (#118).”

If you need more goodies to tide you over, we have promotional stills from the episode as well:

Finally, watch a clip from the episode:

Will you watch ‘The Flash’ season 1, episode 18, ‘All Star Team Up’?