Justice League S2 E 7-8 "Maid of Honor"

An excellent pair of episodes written by the late, great Dwayne McDuffie.

Wonder Woman is in Paris attending a high-class dinner party when she meets Princess Audrey of Casnia, a celebrity party girl who turns out to be engaged to Vandal Savage! When Princess Audrey disregards her advice and leaves with Vandal Savage, Wonder Woman flies after their plane, only to be knocked out of the sky by a sonic attack from Savage's right-hand man, Colonel Vox.

Next episode, Wonder Woman is woken up by Batman ("That's quite a shot you took"), and learns that Audrey has moved up her wedding date. Determined to stop the wedding, she and Batman travel to Casnia and begin fighting their way through the Royal Guards. One of the royal guardsmen fires an RPG into the tree that Wonder Woman is wielding as a weapon, temporarily stunning her. Wonder Woman perseveres, and throws a tank through the wall of the church! When she tries to talk to Audrey, however, Savage zaps her unconscious with a holdout blaster. The Royal Guards drag her limp form out of the room. Later that night, Audrey goes down to the dungeons, and wakes up Wonder Woman, who is hanging from the wall in some kind of high-tech manacles. Audrey tells off Wonder Woman for interrupting her wedding and leaves her there, helpless to escape.

Eventually, Batman breaks her out, and they team up to stop Vandal Savage.
Source: DVD