Well, I can think of two telepath episodes that we might be talking about
: "Mind War" and "A Race Through Dark Places". I'm thinking he's referring to the former, because the episode after that is "The War Prayer" which has a pretty strong element of Homeguard in it - the "anti-alien Earth people".
If that is correct Phily B
, then the episode called "Mind War" has perhaps the line most descriptive of the entire series in it. From G'Kar to Catherine Sakai:
"Let me pass on to you the one thing I've learned about this place: No one here is exactly what he appears. Not Mollari, not Delenn, not Sinclair .. and not me."