Titled “What We Leave Behind,” the episode is officially described as follows: “After Prometheus attacks Curtis (Echo Kellum), Oliver (Stephen Amell) realizes Prometheus knows all of Team Arrow’s secret identities and is planning to come for them one by one.
“What We Leave Behind” will air December 7 on The CW.
Felicity (Emily Bett Rickards) and Detective Malone (guest star Tyler Ritter) discover a clue that links Prometheus to Oliver’s past.”
The series is executive produced by Greg Berlanti, Marc Guggenheim, Andrew Kreisberg and Sarah Schechter.