The season airs on Wednesday nights at 8:00 PM prior to Batwoman.
After defeating the aliens and saving Earth, the Legends find themselves stranded in 1925 Odessa, Texas with a destroyed Waverider. Wanting to help fix things, Astra tries using her powers, which creates unwanted attention from the town and that of the new Director of the Bureau of Investigation, J. Edgar Hoover, and a surprise no one expected. Realizing they need to escape, Sara and Ava create a distraction by going on a crime spree with Hoover hot on their tails. Meanwhile, Zari is finding it hard to get over Constantine, so Behrad suggests the only thing he knows that can help.
- Caity Lotz as Co-Captain Sara Lance/White Canary (1/13)
- Tala Ashe as Zari Tarazi (1/13)
- Jes Macallan as Co-Captain Ava Sharpe (1/13)
- Olivia Swann as Astra Logue (1/13)
- Adam Tsekhman as Gary Green (1/13)
- Shayan Sobhian as Behrad Tarazi (1/13)
- Lisseth Chavez as Esperanza "Spooner" Cruz (1/13)
- Amy Louise Pemberton as Gideon (1/13)
- Nick Zano as Dr. Nate Heywood/Steel (1/13)
- Matt Ryan as Dr. Gwyn Davies  (0/13)
Special guest starring
- Dominic Purcell as Mick Rory/Heatwave (0/13)
- Wentworth Miller as Leonard Snart/Captain Cold (0/13)
- Alexandra Castillo as Gloria Cruz (1/13)
- Giacomo Baessato as Director J. Edgar Hoover (1/13)
- Andrew Wheeler as Sheriff Thomas Wood (1/13)
- Anthony F. Ingram as Pastor Hanson (1/13)
Filming began on July 12, 2021 and concluded on December 14, 2021.
- On July 25, 2021, co-showrunner Phil Klemmer revealed that John Constantine would not be returning in the seventh season, but that Matt Ryan would be back to portray a new character named Dr. Gwyn Davies, described as "an eccentric scientist from the early 20th century who might be the team's only hope next season."