That particular Sony TV didn't support chromecast, apps except those made to work for it. Traditional apps install every time you run them - the tv's have larger long lasting customized and improved versions for what they offer. That's the only way its chromecast like. This is common of many early Android Smart TV's, and Content controlling customers by company's for profit. It did support Airplay emulation however.
Newer TV page disclaimers are a little more clear about chromecast app support is individually controllable by the manufacturer.
Even the never ones do This sometimes.
Wait a second ! nPlayer supports Apple AirPlay! Give that a try at least!
(also most users ended up with their problems caused by lack of internet connectivity on the TV)
Check around - your nearest iPad competitor is Infuse, which scrapes the whole network share and shows TV Series with posters instead of bunch of files. It has Trakt support.
The only feature left me staying with nPlayer was an ability to set subtitle and audio (got BT headphones) offset.
You've got an ability to find a correct subtitle via OpenSubtitles based on a file name. No troubles finding a correct episode, huh?