Mexican Stand-Off is the 1573rd episode of The Bill.
D.S. McAllister pushes her informant and lover Jamie Ross too far when she tapes a privileged conversation between Ross and a client who admits to intimidating a witness in a court case. When Ross makes an official complaint against her, she turns to D.C. Riley for help and threatens to expose his cover-up of his brother's involvement with the French car gang unless he backs her up and says that he was present at all her meetings with Ross.
- Natalie Roles as DS Debbie McAllister
- Gary Grant as DC Paul Riley
- Ged Simmons as DI Alex Cullen
- George Rossi as DC Duncan Lennox
- Chris Simmons as DC Mickey Webb
- Simon Rouse as DCI Jack Meadows
- Jeff Stewart as PC Reg Hollis
- Eric Richard as Sgt Bob Cryer
- Samantha Robson as PC Vicky Hagen
- Holly Davidson as PC Roz Clarke