In a recent episode of The CW's Batwoman, the titular heroine used a convincing trick to convince Sophie that she isn't the masked hero. To do this, she had her former flame, Julia Pennyworth (Alfred's daughter), put on the cape and cowl herself while in the room with Kate, thus making it seem to everyone else that Kate Kane and Batwoman were two separate people.
The ole switcheroo is a pretty convincing tactic that worked well for Kate, but it's not a very original idea in the scope of the Arrowverse. The universe's progenitor, Arrow, has used this same trick several times for its title character, with one variant of the idea being used as recently as Season 6. Here's a look back at the many times that Arrow has dishonestly changed the head under the hood.
My Name Is John Diggle
In Damaged, the fifth episode of the first season of Arrow, Oliver Queen was already under suspicion of being the character who was then still referred to as The Vigilante/The Hood. Even though he had passed a polygraph test to prove his supposed innocence for The Hood's crimes, he was placed under house arrest to ensure compliance with the law. Crime in Star(ling) City never sleeps, however, and at the time, German arms dealers were wreaking havoc. Meanwhile, the incapacitated Oliver put on a prison-themed house party to both continue his facade of a foppish playboy, as well as play along with the police.
Oliver had also recently let his drive/bodyguard John Diggle in on his secret life, as part of a desperate attempt to save his life from a gunshot wound. Thus, to stop the arms dealers and create the facade that he isn't The Hood, Oliver enlists Diggle to put on the costume and scare some sense into the criminals. It helps get the heat off of Oliver, but it's definitely not the last time that the ploy would be played.
Under the Green Hood
The next attempt this method would happen in Season 3 of the show, where it would have disastrous ramifications for a certain member of Team Arrow. In Public Enemy, the 18th episode of Season 3, Quentin and the Starling City police have Oliver in custody, having been informed that he is the vigilante now known as The Arrow. To save Oliver from his certain doom, however, his protege Roy Harper/Arsenal makes the ultimate sacrifice for his mentor. Intervening with the transport caravan holding Oliver, Roy gives himself up while in costume as the Arrow, allowing the police to arrest him and claiming to have been Starling City's vigilante all along. This, along with Roy's subsequent faked death, clears Oliver's name but forces Roy to have to desert his old life to complete the ruse.
The next time the trick was used is in Tribute, the second episode of Season 6. It starts when Oliver is placed under an intense microscope by FBI agent Samanda Watson. Convinced that Oliver is the figure now known as the Green Arrow, her actions force the titular hero to put down the mantle temporarily. In his stead, he again asks Diggle to put on the hood. The cracks in the ruse begin to show, however, when it's noted that no arrows were found at the location of the latest Green Arrow sighting. This makes it evident to Watson that the individual under the hood is not the same one as normal.
However, in the 21st episode of this season, Oliver, who at this point is under trial for his supposed actions, uses the trick one last time on a much larger scale. The trial is literally crashed into by a seemingly alive Tommy Merlyn, who claims to have been Green Arrow all along and to have faked his death years before. In actuality, Tommy is really the master of disguise Christopher Chance, a.k.a. Human Target. The plan would have worked, if not for the judge working for Ricardo Diaz, anyways. Eventually, Oliver publicly reveals his identity on national television in the season finale, thus ending any need for a disguise.
Since Batwoman in just in her first season, the secret identity hijinx will probably be dragged on for a while. Hopefully, that doesn't mean having half of the supporting cast dress up as the title hero.
Created by Caroline Dries and developed by Berlanti Productions and Warner Bros. Television, Batwoman stars Ruby Rose, Rachel Skarsten, Meagan Tandy, Camrus Johnson, Dougray Scott, Elizabeth Anweis and Nicole Kang. The series airs Sundays at 8 p.m. ET/PT on The CW.