It was Bryce who, on the advice of Patrick Macnee, altered Cathy Gale's role to be the finer balance of femininity and strength for which The Avengers became renowned.
Although Bryce began the search for a replacement, it was an entirely new production team headed by Julian Wintle which took the fourth series forward, with Diana Rigg joining Macnee.
Bryce went to produce a number of other ABC series following The Avengers, including Public Eye with Alfred Burke and Redcap featuring John Thaw.
The initial task was to find a replacement for Diana Rigg, who had elected not to renew her contract; Bryce chose the relatively inexperienced Linda Thorson, with whom he was also in a relationship at the time.
Bryce set about developing a feature-length series opener entitled "Invitation to a Killing"; this was to introduce Thorson's character Tara King, who was (as with her predecessors) already known to and working with Steed.