July 30, 2002, 10:17AM Spotlight Turns on Dead Orthodontist's Mistress By CAROL CHRISTIAN and RUTH RENDON Copyright 2002 Houston Chronicle Photo from tape provided by Blue Moon Investigations Gail Bridges, left, disguised as "Leslie," and her friend Julie Knight, appearing as "Lisa," appeared on a Sally Jessy Raphael show in April 2001. Knight's ex-husband had alleged the women were having an affair. The case of the Friendswood dentist accused of murdering her husband by repeatedly running over him has taken more twists as tales of spying and allegations about the "other woman" emerged from court papers and an episode of...