I can't wait for Zara to get found out over her bullying and victimization of Sid.
I think Heston will be the one who uncovers the whole extent of it, and will put in a complaint against her, which will mean a disciplinary tribunal and the BMA becoming involved. Cue Zara being suspended, (with EDW going on maternity leave) and spending more time with Joe.
Personally, if EDW wasn't pregnant, I would like to see Karen slap Zara and wrag her all over reception again, and giving her another wedgie. 
SOTD was confusing. Adam raped Jenny according to the flashback scenes and she killed him? And set the other guy up for not doing anything? He was a wimp who should have called the Police, ( mainly Rob, the Letherbridge one man law enforcer) but he didn't deserve to be framed for murder.
But, Jimmi thinks that she had planned this for weeks/ months because of missing/wiped CCTV footage of her casing the place where the body was disposed of out. Why? Had Adam raped her before? That is what is confusing me. 
I should point out I was only half watching the episode, whilst doing paperwork, even though I am technically on annual leave this week and not in my office. I might have therefore missed something. BTW, that manipulative Jenny reminded me of Amanda Knox to look at.