Dude (in 3x16 "Revenging Angel" by John)
Four-armed Tralk (in 4x11 "Unrealized Reality" by Rygel/D'Argo)
Four-arms (in 1x17 "Through the Looking Glass" by Chiana)
Fraudulent Pilot (in 4x05 "Promises" by Sikozu)
Frellwik (in 4x06 "Natural Election" by Rygel)
Hombre (in 4x06 "Natural Election" by John )
The Man (in 3x11 "Incubator" by John)
Mr. Bad News (in 2x10 "My 3 Crichtons" by John)
Pilote (in 4x06 "Natural Election" by John )
Shellhead (in 2x04 "Crackers Don't Matter" by John)
Transparent Purple Guy (in 1x01 "Premiere" by John)