  We present the results of a search for Extended Emission-Line Regions (EELRs)
ionized by extant or recently-faded active galactic nuclei (AGN), using [O III]
narrowband imaging and spectroscopic followup. The sample includes 198 galaxies
in 92 strongly interacting or merging galaxy systems in the range
z=0.009-0.0285. Among these, three have EELRs extended beyond 10 kpc in
projection from the nucleus detected in previous studies. We identify a single
new distant emission region, projected 35 kpc from UGC 5941. Our optical
spectrum does not detect He II, but its strong-line ratios put this in the same
class as securely characterized EELR clouds. The nucleus of UGC 5941 is
dominated by recent star formation, preventing detection of any weak ongoing
AGN. Overall counts of distant EELRs in this and the previous TELPERION samples
give incidence 2-5% depending on galaxy and AGN selection, 20-50 times higher
than the Galaxy Zoo EELR survey with its higher surface-brightness threshold
and much larger input sample. AGN in interacting and merging systems have an
increased detection rate $12+/-6$%, while none are detected around
noninteracting AGN. Some of these AGN are at luminosity low enough to require
additional X-ray or far-infrared information to tell whether the EELR
ionization level suggests long-term fading.
