With an unwanted house guest (Raffi Barsoumian) aboard the Waverider, Sara Lance (Caity Lotz) and the Legends find themselves in an unusual situation when Mick (Dominic Purcell) goes into labor and needs a little help delivering his and Kayla's (Aliyah O'Brien) offspring.
Meanwhile, with Constantine's (Matt Ryan) situation getting worse by the minute, Zari (Tala Ashe) enlists Astra (Olivia Swann) and Spooner's (Lisseth Chavez) assistance to get to the bottom of what he's been up to, and it's probably a safe bet that she's not going to like what she finds.
Check out the new promo for episode thirteen, titled "Silence of the Sonograms," below:
"Silence of the Sonograms" - (8:00-9:00 p.m. ET) (TV-14, LV) (HDTV)
LETTING YOUR GUARD DOWN - With the Legends on high alert with their unwanted guest in their custody, Ava (Jes Macallan) is tasked with the interrogation while Nate (Nick Zano) and Sara (Caity Lotz) watch. Rory (Dominic Purcell) is struggling with the terrible pain in his head and Gary (Adam Tsekham) tries to help to manage it the best he can. Meanwhile, Zari (Tala Ashe) enlists Astra (Olivia Swann) and Spooner's (Lisseth Chavez) help to figure what is going on with Constantine (Matt Ryan). Shayan Sobhian also stars. Nico Sachse directed the episode written by Phil Klemmer & Morgan Faust (613). Original airdate 8/22/2021.