Though it is possibly shown on TV it would depend on where in the world you are as to which channel and at what time it may be shown.
You would need to check broadcasts in your location.
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You tube should do the trick
You can watch it on tvshack.cc and type in hellcats. All the episodes up to the lastest one are on there.
go to abc.com then go to series, click pretty little liars, go to episodes, and click season 1 episode 16
season 1 episode 5
Season 3, episode 21: "Family Guy Viewer Mail #1"