Dixon's Callsign

[Stratford girl]

Anyone happen to know Dixon's callsign from seasons 1/2? I'm not talking about season four's Outrigger, I'm thinking of the one he must've had before Outrigger, since everyone got new callsigns in season four.
Please PLEASE help, it's driving me crazy!
Thanks!

 

[Dark Phoenix]

I think is old codename was retriever.

 

[Patomac]

No, I think Weiss was retriever in S3. I don't know if they ever mentioned Dixon's callsign.

 

[Dark Phoenix]

Yeah I just saw the episode 1 of season 3 and Weiss callsign there was retriever, but did Dixon also have this callsign ? and if not what was his SD-6 callsign ?