I hate this Kara/Mon-el shyt as much as I do Olicity...it is forced badly written ass.
Mon-el being the one who was so intensely distrustful of Dean Cain was dumb. Mon-el has never given a damn about any of the inner workings at the DEO aside from using it as a way to get close to Kara so him being invested in who gets security clearance was some contrived bullshyt.
How exactly does one paunchy middle-aged man with a single bionic arm beat a squad of highly trained alien catchers and a fukking martian?
And is Cadmus having budget issues? Why just give Dean Cain one robot arm and leave the rest of him normal?
Are there no stun settings on DEO guns? Alex could have just zapped Dean Cain and brought his ass in. I have seen them use non-lethal ordnance on this fukking show a million times.