The Hooker family time line: Hooker's dad, played by John McLiam says his character is 64 years old, making his year of birth circa 1921. McLiam was actually 67 years old at the time. He had been retired 10 years, meaning he medically retired at age 54 circa 1975 after 25 years of service. This means he joined the LCPD circa 1950 at age 29. About this time in 1985, T.J. Hooker had about 18 years of police service and had served in the Vietnam war, so he joined the LCPD circa 1967. Presuming T.J. Hooker enlisted at age 18 circa 1964 and served just one tour, he would have joined the LCPD around age 21, making him about 39 at the time vs William Shatner's actual age at the time of 54.
At 19:16 the night street scene is stock footage from several past episodes.
Hooker's dad was played by John McLiam, who was only 13 years older than William Shatner. Like Shatner, he was a Canadian. McLiam first appeared on the series 2 years earlier in Slay Ride (1983) as a priest.