As Andrew points out, it actually does quite well:
THE EXPERT
Series 1
05.07.1968 The Unknown Factor (missing)
12.07.1968 It Can't Be Done
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
19.07.1968 Liars, Damn Liars (missing)
26.07.1968 Miss Daley (missing)
02.08.1968 Nice Day (missing)
09.08.1968 The Long Hate (missing)
16.08.1968 Nobody's Going to Hurt You (missing)
23.08.1968 Here Lies... (missing)
30.08.1968 The Contact (missing)
06.09.1968 He's Good for It (missing)
13.09.1968 Fire Without Smoke (missing)
20.09.1968 Full Choke (missing)
27.09.1968 And So Say All of Us (missing)
Series 2
04.04.1969 The Visitor – 1: Hypothesis
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
11.04.1969 The Visitor – 2: Hard Facts
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
18.04.1969 The Visitor – 3: Judgement
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
25.04.1969 The Yellow Torrish
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
02.05.1969 The Gun That Walked
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
09.05.1969 One Life – More or Less
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
16.05.1969 A Question of Guilt
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
23.05.1969 A Family Affair
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
30.05.1969 Death in the Rain
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
06.06.1969 Protection
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
13.06.1969 Post-Mortem on Harry Kirby
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
20.06.1969 Do Not Go Gentle
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
27.06.1969 Playing with Fire
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
04.07.1969 The Sardonic Smile
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
11.07.1969 The Witness – 1: Threats
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
18.07.1969 The Witness – 2: Involvement
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
25.07.1969 The Blue Spot
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
01.08.1969 Lethal Weapon
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
08.08.1969 Lie Down, You're Dead
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
15.08.1969 Eddie (missing)
22.08.1969 No Home in the City
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
29.08.1969 Your Money for My Life
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
05.09.1969 Dependence – 1: A Life Saved
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
12.09.1969 Dependence – 2: A Life Lost
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
26.09.1969 Sufficiently Loved and Cared For (missing)
Series 3
10.01.1971 Where Are You Going?
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
24.01.1971 Go Somewhere Else
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
31.01.1971 Whose Child? – The Wife
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
07.02.1971 Whose Child? – The Husband
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
14.02.1971 Cedric
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
14.03.1971 Smithereens
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
21.03.1971 Hothouse
A 16mm black-and-white film print exists, but the programme was originally made using 2" colour videotape.
www.tvbrain.info/tv-archive?showname=expert&type=lostshowSo it's 12.07.1968 It Can't Be Done which exists from the first series.