A to Z Challenge - Y is for You're being watched

The A to Z challenge is to write a daily blog post centred around a different letter of the alphabet each day. I will attempt to write a complete story which will continue each day and hopefully draw to a conclusion when we get to Z.
For previous posts click a letter - A , B , C , D, E , F , G, H, I,  J, K, L, M, N, O, P, Q, R, S, T, U,V , W, X,
 

DI MacDonald pulled into the lab complex just as April rounded the corner heading towards her rendezvous with Paul and Davey.
‘Can I help you...