"Robservations" today:

Nick Digilio returned as overnight host Sunday on Nexstar Media Group news/talk WGN 720-AM after a lengthy absence said to be part vacation and part disappearing act. No wonder all questions about him drew radio silence from his bosses. A few of Digilio’s cryptic Facebook posts (“It’s been a rough few days, but I’ll be fine,” and “Man, it’s been a crazy and stressful month”) only added to the mystery. Back on the air, Digilio told listeners he spent part of the time staying with his parents. “I needed to be with my parents,” he said. “Thank you for your concern. I’m back. I’m working.” It’s not the first time Digilio had been missing in action for personal reasons. The WGN Radio Walk of Famer, who recently marked his 35th year at the station, moved up to full-time host in 2013.