I m having little pains in my hands so just putting highlights of the episode:-
Raj asks someone to trace the call of huda.
He pretends as if something is wrong with him and then seems all ok in frnt of huda. (I missed this part)
The confrontation bet raj and huda continues- Raj proves to huda tht he is the spy cadet whereas huda doesnt take up these allegations saying tht he is the terrorist. Raj then reveals his true identity bt still huda is not convinced and continues to blame raj. Raj asks him for the apology and says tht I can prove u as a spy cadet and if tht happns then ur future will be destroyed. Huda says tht he cannot go against his own country. And goes on saying tht he is the terrorist and challenges raj to prove him as a spy cadet.
Naina is overhearing the convo. She goes on to raj and apologises for hearing bt says tht she doesnt belive tht huda is the spy and tht she will prove tht. And asks whether navin was charges somewhere to the similar coincidences. Raj is silent bt argues tht huda is the spy bt naina says tht there was a day when huda saved me and believed me and now its my turn and I will prove it why he is doing or behaving in this way.
She comes to huda and asks huda wht raj said is true. She says tht she doesnt belive tht he is the spy and asks for the answer. Huda says tht he was the one who was responsible for making car brakes fail of raj and tht he tried his best to kill raj bt all the time naina used to come in bet. Naina is shocked on hearing this and the epi ends on her face.