...

but it's substantially more than 25% of the time that a woman needs rescuing by a man, even in B7.

What always sticks out in my mind is how d*mn many times Blake needed Avon to bail him out. Although there were also plenty of times Avon needed bailing. Dayna was the main rescuerer of arses, male and female, in Ultraworld, I would say. (Vila gets credit for assisting ORAC in scrambling the Ultraworld mind, but Dayna's the one who exploded herself and Tarrant out of captivity so they could fetch Avon and Cally). Come to think of it, Dayna was the rescuer in Aftermath and the muscle who dealt with the troopers in Powerplay. Cally, in most of the telepathic-danger episodes, was both in need of rescue and the power that could deal with the enemy (Shadow, Dawn of the Gods, Sarcophagus). In Volcano, she needed help, but actively assisted the others in finding her. I haven't crunched numbers, but I don't think that the women were put in the capturee situation all that often.