Marvel's Avengers Assemble Season 5 Episode 21 - Widowmaker Episode Title:Widowmaker.Episode Description:With the information given to them by Killmonger, Black Panther, Iron Man, and Captain America look for the Shadow Council's base in order to find Black Widow. They trace her location to an La Isla Sombra that negates all technology. While exploring an abandoned laboratory, Black Panther, Iron Man, and Captain America find Black Widow who explains that the laboratory was where they developed plant monsters as part of their super soldier program. Afterward, Black Panther discovers that Bask has awoken and has sided with Killmonger and Madame Masque while also freeing M'Baku and Ulysses Klaue.