Doyle: Orson, we're in a situation here.
There are at least three possible explanations for this.
1. Angel was gorging himself on food at the time so, Orson may refer to Orson Welles. Orson Welles was a famous actor/director who in his latter years was known for his girth and huge appetite.
2. Orson may refer to a character on Garfield and Friends. Orson was a pig and the one every one turned to when something went wrong. Doyle may know this because he taught grade three and might know some of the tv shows his students watched.
3. He's referring to Orson from the tv show Mork and Mindy. Orson was Mork's superior and Angel is Doyle's superior.