“The Walking Dead” star Lauren Cohan has not been able to spend much time with her co-stars from the zombie series since leaving in the middle of Season Nine. She went on to become the star of ABC’s “Whiskey Cavalier” but a return for Cohan as her Maggie Rhee character has been a long-running topic of conversation. “I was just like, I’ve done this show for a long time,” Cohan said when explaining why she left “The Walking Dead.”