The Fall and Rise of Reginald Perrin

S1 E6: Trying a Frenchman, Welshman, Scotsman and an Italian

Reggie tries out various new identities, including Lord Amherst (which attracts the attention of the comely Jean) and Donald Potts (which attracts the less comely Miss Pershore). However, he misses Elizabeth and is upset to find that, since she assumes that Reggie is dead, she's seeing an old flame.