The second episode credited to Carlton Television, and the final one to be shot in the original aspect ratio.
The first murder victim is a fellow of the fictitious Wolsey College, the scenes being filmed at Christ Church, which was founded by Thomas Wolsey in 1546. Although it is a college of the university, it is known only as Christ Church, not Christ Church College. Christ Church Cathedral is within the college, and serves as its chapel, as well as being the cathedral of Oxford.
Colin Dexter's customary cameo doesn't turn up until the second half of this episode, when he appears as a patient, with crutches, in the waiting room of a hospital.