Gary Busey
The Academy Award nominee made a short cameo in the Season 9 episode called “ Frodo’s Headshots ” as a patient in the psych ward. It’s where Alan wound up following a mental breakdown triggered by Charlie’s shenanigans.
Source: eonline
Busey has appeared in over 150 movies, including Lethal Weapon , Predator 2 , Point Break , Under Siege , The Firm , Carried Away , Black Sheep , Lost Highway , Fear and Loathing in Las Vegas , The Gingerdead Man , Quigley , and Piranha 3DD . Busey has a daughter from a previous relationship named Alectra. He also has a son named William Jacob “Jake” Busey, who was born in 1971. This was back when Busey was married to Judy Helkenberg. He is engaged to Steffanie Sampson, and they had a son in February 2010 named Luke Sampson.